I have read, I believe, every book that Dr. Greene has written. There is simply on one on the planet who can explain complex subject matter in a manner that even I can understand. Thank you, Professor Greene, for allowing me to see and appreciate the wonderful universe that we all inhabit.
Greene as a teacher to a layman like me is breathtaking, phenomenal and rare to encounter. Almost if not entirely one of a kind. I say entirely because this gifted teacher just gave a lecture on a difficult subject to understand to a non-physicist and n0n-mathematician just like me: the conceptualization of Special Relativity. Nobody in my book has explained Special Reavity and what it means in practical terms the way Green has. Outstanding!!!!!!!!!!!!
@@stevemuturi965being dead, Sagan won't be able to reflect a current understanding of these topics. And even at this dumbed down level, some important details of the interpretation have changed since Sagan went away.
@@josephsmith6777 that’s more about the depth of your understanding and your ability to explain it at various levels. It doesn’t mean that any truly accurate model of the universe is necessarily going to be fully comprehensible to any human, let alone a twelve year old. The universe owes us nothing. And our brains were shaped by an evolution to be just good enough to enable us to pick fruit, hunt wild game and get through an ice age. There was nothin in there about being able to perceive ultimate reality.
@@X-boomer no but u can explain the solar systems basically to a 12 yr old I learned newton's equations in 7th grade so the same way green describes huge equations and the connection to live experiment the basics aren't terribly hard to explain 😀
You have just witnessed a lecture on constant velocity motion and special reatuvity that will never be surpassed! Professor Brian Green has got, to be, the most brilliant and erudite educator on all aspects of physics, the universe, cosmos and quantum physics bar none, His enthusiasm, clarity and techniques of getting his message across is absolutey phenomenal! Thank heavens for teachers in his vain. They are very few and extremely far between... We love ya Brian!!!
Time flows in a universal fashion everywhere and is not subjective. It's the devices used that are giving a faulty reading. It's the gravitational fields that effect the instruments which is more than quite easy to comprehend... Time is a standard unit of measurement that is fixed constant and is nothing more than a human construct. Does an inch shrink or expand depending on gravity? No but in a sufficient enough gravitational field or lack thereof your tape measure will. Dependence on Physical Processes: Timekeeping devices, such as clocks, rely on specific physical processes (like oscillations of atoms in atomic clocks) to measure time. These processes can be influenced by external conditions, including gravitational fields and relative motion. Flaws and Limitations: While these instruments are incredibly precise, they are not infallible. Their readings can be affected by various factors, including gravity, temperature, and even electromagnetic fields. Thus, any variations in their measurements do not indicate a change in the fundamental nature of time. Gravity's Influence on Time Measurement Gravitational Time Dilation: As established in Einstein's theory of relativity, the presence of a gravitational field can affect the rate at which timekeeping devices operate. Clocks in stronger gravitational fields (like on Earth) will tick more slowly compared to those in weaker fields (like in space). This is a result of the physical effects of gravity on the mechanisms of the clocks, not a change in time itself. Consistency of Time: The concept of time as a constant remains intact. Regardless of the gravitational field, the underlying flow of time does not change. It is the instruments that are influenced by their environment, leading to different readings. Subjective vs. Objective Experience: While our subjective experience of time may vary based on circumstances (like being in a hurry or waiting), the objective measurement of time remains a reflection of the processes we use to observe it. The variations in these measurements are due to the instruments and their interactions with gravity, not a fundamental change in time. The tests and methods done to substantiate time dilation are fundamentally flawed and the exact same results can be replicated by exposing any clock to cold temperatures, Using the same flawed logic you could say that cold slows time down which would be another crock!
Dr. Greene is a true national treasure within the realm of explaining complex physics to everyone, regardless of their level of understanding and/or education.
He stole it all and still got it wrong. Einstein was a Useful Idiot just like this woke idiot and wrong about everything. Now you are dumber for watching.
Many of us still do. The majority of people though, oh well... Let's just say they are a bit simpler and leave it there, before someone takes offense at my words. :D
@@gerardcousineau3478 Einstein was actor, who played role of original author of his theories, while they were result of long process of groups of peoples who cooked them in back kitchen. That is why he was not involved in group projects like Manhattan, and never be in proximity of others like he not became guide of any student for doctrate while working in universities. Many things quoted or attributed him to made image of him as genius, too much publicity is needed to conceal flaws. Things like his brain was bigger so more intelligent, later it proved that there is no such correlation. He done his thesis under Minkowski who was already working on relativity with others like Poincare, Lorentz to fulfill ideas of Maxwell.
Being a science student and a teacher (in a different field) can vouch on the beauty of your arrangement of thoughts and delivery of the subject. I never grasped the theory of relativity as clearly as i did today. Imagine my concentration to have realised after 1:30 minutes of continuous watching. Good job!
I never went to high school. Theoretical physics, subtopics particals,, quantum theories attract my imagination n I'm so grateful these videos explain so much of the questions I've been asking myself for years.
Do not worry, even if you would have gone at high-school, the rotten teachers and fked up no life kids who's parent never bothered to help them make a difference between right or wrong and much more, would have sucked out everything good from you, just do you and learn now with the tech at hand, what you really like, every word every sentence you Don t understand from these kinds of videos, just search them and see what they mean, memorise it and go on to the next YOU thing.
I know what you mean. I left school without finishing grade nine to go to work. UA-cam is school these days. I remember having to go to the library to look for things I wanted to learn and even that in itself was a challenge. Now in just a couple minutes I have a choice of ten specialists to choose from to show me what I want to know. Such a wealth of information.
Hi. Prof. Brian Greene. In the beginning, recently, I watch your program by chance. But now, I am hooked and become your staunch follower. Your lectures are very interesting and enjoyable even for someone who does not have any background in physics or cosmology. I feel you are giving lectures on cosmology like reading a poem. I love it, sir. I am watching from Thailand.
I am somewhere watching between the East and the West: relatively in relative world views consideration for "change" vs. for measuring what is the highest value cross culturally or what it means to "know" something (epistemology), Orr what is logic as understanding "process" by the axiology of our values as may be seen by the cohesiveness of the group herein as astro physicists non-technically!
The major world views hold axiology to advance questions of what is the highest value cross culturally, what does it mean to know something, snd what is change, and what is logic. The psycho linguistics in aspects of cultural differences suggest the Whorfian Hypothesis ststes that no two people have the same view of the real world view in the same way unless their linguistic backgrounds are similar. The Mustrician Hypothesis goes deeper to suggest that Man has to rationalize his existence and does so through linguistic orientations. Perceptions abstract information within human ranges potentiated by technology herein as astro physicists to chase light. Our puny brains have abstracted therein the s Standard model being a theory for s partical physics requiring CERN is the top of the arts and sciences. Here process for our world view defines technology.
That is really really not true. Every theoretical physics student does not have a great teacher. In fact most of us have really shitty ones. But we get by just the same.
I'm watching from South Africa, Durban. I am enjoying your lecture, I'm going to actively seek more of your work as you have a layman's way of explaining rather complex scientific concepts
I’m starting my junior year as a physics major this semester, and while I’m used to seeing all these crazy equations that we have to try and solve like Schrodingers, Lorentz Transformations, etc, it’s nice to be able to clearly and simply understand what exactly I’m trying to solve rather than being fed all these letters and numbers and being expected to be a master of special relativity or quantum mechanics and the like. Thanks Brian!
Yah. It is nice to give the equations a narrative. All of these people saying they would have a PhD if greene was their teacher have no idea about the math. Then you take quantum mechanics and it is downhill from there.
Thanks u for this. One of the best videos on internet... I came here thinking let's watch 10 minutes, you held me captive throughout the session.. I just hope time ticks slower on ur 🕒 and u get lot of time to teach many people...
@Enter the Bragn’ if space and time is one - and space is something physical then surely it qualifies as "physics" by your own definition, dosent it? Idk are you looking to distinguish the difference between physics and theoretical physics? I'm just eager to understand🙏🏼
@Enter the Bragn’ ive been searching a little around and is still confused but i found the claim - "In physics, spacetime is any mathematical model which fuses the three dimensions of space and the one dimension of time into a single four-dimensional manifold. ". so its a type of model within physics but not actual physics because of only having physical attributes? and if so, what category does it then fall under?
The more I learn the more I realize how much I don’t know. I have three degrees and bunches of letters following my name, yet I know so little. Thank you Dr Brian…you are the best. I’m continuing to learn.
I’ve been learning stochastic and differential calculus for financial quantitative analysis and took a break to watch this video. I completely forgot myself for those two and a half hours.... I’d always heard of these equations and watched Interstellar several times but never really understood the concept with a high degree of comprehension until now. BRAVO man 👏 this was extremely spot on, and I can’t believe anyone would dislike the video. I never though calculus would come in handy in the real world until two situations in my life: 1-the decision to become a quant, and 2- my new found obsession with time travel and time dilation in general. To quote Family Guy, “why are we not funding this?!”
Dr, Brian Green. You are the best teacher I ever had the pleasure to learn from. I am old but there were things I had trouble grasping. An now it is clear to me. I watch all I can, you are the only one who describes and shows results. Thank you. Ray Parker
The more I watch these videos and ask these questions, the more I realize nobody really knows why. I've been beginning to accept the fact that it is just true and can be measured consistently. These are just properties of reality. I spent my entire lifetime trying to wrap my head around this stuff but I think today I finally get it. I can finally see forward and backward land.
You’d still have to write the exams, and know how to solve the equations ;) But hey , I don’t know you. You may be very smart and good at advance math .
@@DHT2023 no she/he won't be PhD for sure. based on reaction to this very basic lecture she has no fucking knowledge of physics nor she could ever go to level where she can get PhD in physics. this very very basic entry level physics lecture.
One just relies on the scientific process and the results of experiments ie. evidence.... and one just believes something based on? Our senses, memories and intuition cant be trusted... scientists know this... detectives know this... flat earthers are simply ignorant is all
Only If I had more teachers like this. Your teachings are excellent. I have never ever had a physics class like this. My professors would always bully me with students.
Thank you Brian Greene. Thank you. That was so eloquently explained and in such an entertaining style that, at least IMHO, you leapfrogged past Sean Carroll, in terms of communicating your craft to we others (less gifted), and in doing so you help to enlighten us all both now and, hopefully, our prodigy sometime in the relative future -- either through our sharing of what we just learned or via osmosis through our DNA to theirs perhaps. And think of how much better we inhabitants of this planet might be if we all could see it, and everything else around us, through Brian Greene's eyes. Not necessarily his perspective mind you (pardon the pun) but through his eyes. I do have issues with his perspective and interpretations at times but there is no denying his incredible ability to pass-on to us these wonderous things such as this which is shared in the lecture above. Again, thank you Brian Greene. Poles and barns .... lol. Incredible.
Amazing lesson and awesome teacher. I felt like I finally have someone who knows the answers to my questions before stressing a thorough investigation on my own paths. I still have so many questions on this topic, but I know now that someone like Brian Greene can just keep answering them so helpfully and usefully.
I fall asleep to this all the time - I wish my brain would just absorb all this awesome info when I sleep but alas I still struggle to comprehend all of it! But Greene is such a good teacher that I am finally getting a lot of it!
I wish we were taught like this in college :( We were mostly cramming things without actually understanding what's going on. This video is totally amazing!
@@ritvikg that's cool... but you are probably in the minority! Also I'm jealous I wish I was switched on enough to take the path of physics/mathematics in my youth
Dr Green and his lectures are simply amazing .Maneuverd through the different sections ensuring to cover presumably arising questions and visuals blend in precisely. Thank you Dr Green..
In the beginning of this video, my mind broke many times proportional to the tick tocks on the stationary light clock but progressively healed at the rate of the moving tick tock upon multiple viewings and that was awesome to build this foundation of knowledge , incredible instructor !
It may be sophomoric of me, but what I love most about Brian‘s examples and in particular this seminar is that he uses George and Gracie in his examples. And of course that would be George Burns and Gracie Allen. I encourage anyone who doesn’t know who they are to look them up on UA-cam and watch a few of their TV shows Back in the 30s 40s and 50s. Gracie Allen was a genius in her own right although she played exactly the opposite of that. But I’m so happy that he remembers them fondly enough to use them in his examples. God bless George Burns and Gracie Allen. Peace.
So well spoken. Never stuttered, never fumbled for a word, never restarted a sentence. Impeccable speaking on a most difficult topic. Likely an alien...
@@papalegba6759 - Likely get what you are looking for. However this topic is hardly one that a conman could take advantage of due to it's factual content.
@@papalegba6759 - Factual as in actually occurring or based on proven concepts. Neither a conman nor an alien but a scholar explaining difficult to understand but proven realities in layman's terms. If e=mc^2 has been disproven I'd enjoy hearing about it from you. If you're just trolling, you need some better material to amuse and entertain with. Why are you here anyway? Most who view are trying to understand the proven correlation between space and time and matter but something tells me that you are not interested in advancing your understanding of these topics.
Profesor Green Thank you for the photon clock example. Been wondering for 50 years weather time dilation was wrong or just all the examples were wrong. You provided all the math in so simple a manner that I could understand clearly that I had missed nothing as you proved clearly the problem. The light photon in each clock moved the exact same distance. Since it takes the exact same amount of time for both photons to move the exact same distance there was no time dilation only one clock was not up to the conditions it was placed into, so it reported 1/5 the time but your math proved that the clock was not reporting an accurate measure. Both photons traveled the exact same distance :) Thank you so much for your awesome example and for doing the math in so clear and simple manner. Following up by showing this simple ratio was in fact in line with the fancy math let's me finally put this issue to rest. Clocks may fail but time is as consistent as photons are.
I can listen to Sir Brian Greene throughout the day. The way he presents so complicated topics with simpler examples is so soothing. It is really fascinating to believe that we all reside in such a beautiful universe entangled with so vivid concepts
Can you imagine if we had teaches like Wal Thornhill !!!! I like Brian but he says the same old same of as all the others !!! Stephen Hawk ing had handlers !!!If you sturdy his Dis ease you would realize there in no way he could teach a room of students or answer random questions from the audience...The questions were pre programed. The Vatican owns ALL telescopes (behind the scenes) They own L.U.C.E.R.F.E.R. the Most powerful on the planet. The Jesuits own all the "Foundlings' or hos pit als . The THE Big **** Theory was invented by a Catholic priest Along with "black holes" give it two seconds of thought and you know what that really means !! The French refused to use that term because they KNOW !!! "Dark Matter" These ideas are over a 100 years old and its is regurgitated in every university day in and day out !!!
@@cloudleopard7695 I am a EU follower as well many others like Brian, what I like a lote about the EU is that they show a lote of pictures that help a lote in my study. - The EU is good but it wont make it at the long run with just PLASMA as well GR just wont stand with just GRAVITY. - We could make a MATTER CICLE same as the water cycle here in earth, matter is found in 3 states through out the universe, the first state is PLASMA which all stars are made of, plasma could be seen as the NEUTRAL STATE of matter, stars throw OUT UP light from all around which I call HOT LIGHT that to me may be seen as NEGATIVE MATTER, this light sooner or later will be refracted back to the systems DISK they came from at different ELECTROMAGNETISM LEVELS that the systems posses or have, the 3th state is the REFRACTED LIGHT that gets back as COLD LIGHT that to me is nothing less than what they call the CMB, the reffracted light is heavier than hot light so it makes a strongger down push than the HOT LIGHT up push so the difference in between is what it makes the little GRAVITY PUSH to matter from all around. - You might say that this is not enough to keep matter togather but know that matter through out the universe follows ATOMIC WEIGHT same as the light in rainbows, all matter falls down into 2 mayor groups which are the SOLIDS and the gaseous, this 2 sides atract each other reciprocally one to the other but cant mix at all but just a bit so is the fusion that creates HOT light to go UP but by the same time some COLD light is coming DOWN; the atraction is done from NORTH that are the gaseous or positive to SOUTH that are the solids or the negatives in CROSS SECTION, when this 2 sides encounter they form the system s DISK which is the NEUTRAL side where we practicly FLOAT in it so there is no need for gravity to be way to strong, pluss the atraction is done by ENTANGLEMENT like a ELECTROMAGNETIC BAND so the systems stay togather so stars in a galaxie dont flie away.
@@cosmopolitan4598 Compared to people like Michio Kaku & the great Carl Sagan (my all-time cosmology hero), he teaches some pretty advanced stuff. Talking on a stage to an empty room makes it difficult to engage the online audience, but he's really good at it anyway. I have a couple of his audiobooks, and I strongly prefer when he reads them himself. (I admit, I nodded off during this.)
I'm in the hospital right now watching this. I'm not allowed to sleep at all this night for some tests they need to do in the morning. This is kinda helping me stay awake.
I can't believe I actually get to attend lectures from Brian Greene. The internet came along and provided an open invitation to the intellectual community. Some people use it to watch pointless crap. But others use it to attend lectures from the best instructors in the world. The level of education available to the public now is astonishing. I never thought I would understand the mathematics of Einstein, or ever take classes on relativity. But Brian Greene has taught me the fundamentals and it's actually crystal clear. I've even committed many of his equations to memory. And I'm glad to see so many other people who share my gratitude for having access to this information. You all give me hope. And by the way, Epstein didn't kill himself and Oswald didn't kill Kennedy. The internet makes it possible to come to this conclusion. Without the internet, we simply wouldn't know know the facts. The suggestion that Oswald killed Kennedy is ludicrous. I bring it up because I need you evidence-based people to actually look into it for yourselves. The general population has to be made aware of this reality before anything can be done about it.
Sometimes we understand concepts perfectly well but have difficulty articulating them. So your statement that he explains best because he understood it best is not always true. Some people just have a gift of explaining things in a better way.
@@christosbereris5483 ive forgot most of it now but basically i found a way to travel through time and space and just did that for what felt like for days
Flatearthers have to watch it. I often notice that they don't understand relative speed and inertial reference frames. Maybe this clip helps because he's explaining everything slowly enough with many even redundant examples.
Amazing video, thank you so much WSU for putting this together for those of us who are less into the mathemathical side of it. Just one thing that I guess accidentally slipped in is the math for the Pole in the Barn instead of the regular explanation. I had to the switch to the 12 hour video for that one. Anyways, Brian Greene you are the best!
Applying Causality to the speed of light is like watching the past in the south, turn around and expect to see the future in the north. We are not even capable of observing the present.
For the one who didn't understand why the moving clock's time run slower, the velocity or speed is equal to distance / time, here the moving clock's light beam is travelling an extra distance so to compromise with that time of the clock must itself go slower (because if the velocity of speed of the light is always constant)
This is like brain crack. I think I’m finally beginning to get it. There’s so much more to see, think, and feel than our every day normal process of thinking allows for. Even something as simple as thinking of the air as a substance instead of nothingness
Yup. This is the reason why most atheist look at science. When ppl say the "feel" or "intuit" something, it's laughable to those that understand. We don't perceive reality very well. We have a very micro view of reality.
Einstein’s groundbreaking theories of relativity transformed our understanding of space and time, revealing that they are intertwined in a four-dimensional continuum. His theory of general relativity described how gravity is the result of the curvature of spacetime caused by mass and energy, fundamentally altering the way we perceive cosmic phenomena. This shift in perspective has had profound implications for both theoretical physics and practical applications, such as GPS technology. As we continue to explore the depths of space and the fabric of time, how might Einstein’s revolutionary ideas be expanded or challenged by new discoveries in modern physics?
Once again thanks for UA-cam and its content creators...access to videos like this are often more instructive than classroom college lectures on the same subject. Yes, I could do with less of Professor Greene jumping around on a stage, but that seems a small price to pay. No, this does not replace the in person experience of going to an institution of higher learning but what a boon to the rest of us who are no longer in school.
Am somewhere in Kenya, it's almost 2am at night, and am listening to this staring at the sky full of stars. Something isn't making sence somewhere. In Swahili, Space(Nafasi) and Time(Wakati) are two words that can be used interchangeably in a sentence. I shall rewatch tomorrow when am refreshed. I like how this guy explains stuff though.
The next time you look at the Starry Night, recognize that the Dark Space between the stars, the Dark Matter and Dark Energy, COMES from the stars. In the Raisin loaf analogy, it is the Raisins that are unfolding into their Spatial counterpart. Look up, and see that the stellar matter (stars & galaxies) IS the Space in yet another one of its many forms. All for One and One for All.
Amazing information..excellent explanation..how calming..this is the lecture I search for beginning...love and respect 🙏 for every one who makes the beautiful video...thank you.
What boggles my mind is how in the hell could Einstein have had such an incredible insight! Dude was probably the smartest human who ever lived. Not necessarily in term of raw IQ, but his ability to make such improbable connections. And Brian’s mastery of not only the subject, but the language, allows morons like me to comprehend it.
yeah, Brian G is a good professor and the dude is a really really really mesmerized by Big E! But here Brian did threw me a curve ball @ relative speed concept of 8m/s grenade if I 're to approach it @ 3m/s to as to what was otherwise thrown @ me 5m/sec
@@txlish These space/time talks drive me crazy. If a ball is thrown at 5m/s and you are moving towards the ball at 2 m/s, it doesn’t change the speed of the throw. It only changes the distance the ball travels.
Isn't that a miracle that we can watch this incredible lecture by world's leasing physicists for free at any moment in spacetime ! We are so lucky !
agree
I agree
Z
@@socialmeaslesinpartnership1252 then why are you here? Over 2 hours you either didn't watch it all, or were interested in it enough to watch it.
Wait to watch mine
Can you imagine what we could accomplish if we all had teachers like Brian Greene?
The secrets of universe
Flat earth people wouldn't exist.
We should clone him. A million Brian's should be enough to shift the pendulum in humanity's long-term favor.
Hopefully find a better theory then sting theory
what are you talking about , he's right there. can't you see? we have him as a teacher? What's holding you back?
I have read, I believe, every book that Dr. Greene has written. There is simply on one on the planet who can explain complex subject matter in a manner that even I can understand. Thank you, Professor Greene, for allowing me to see and appreciate the wonderful universe that we all inhabit.
True, too bad string theory is worthless
Greene as a teacher to a layman like me is breathtaking, phenomenal and rare to encounter. Almost if not entirely one of a kind. I say entirely because this gifted teacher just gave a lecture on a difficult subject to understand to a non-physicist and n0n-mathematician just like me: the conceptualization of Special Relativity. Nobody in my book has explained Special Reavity and what it means in practical terms the way Green has. Outstanding!!!!!!!!!!!!
Greene is good, DeGrasse Tyson is great, Carl Sagan is the one you should be looking for; "Cosmos", my young Padawan!
@@stevemuturi965being dead, Sagan won't be able to reflect a current understanding of these topics. And even at this dumbed down level, some important details of the interpretation have changed since Sagan went away.
I was told if you can't explain the general concept to a 12 yr old it may be completely wrong
@@josephsmith6777 that’s more about the depth of your understanding and your ability to explain it at various levels. It doesn’t mean that any truly accurate model of the universe is necessarily going to be fully comprehensible to any human, let alone a twelve year old. The universe owes us nothing. And our brains were shaped by an evolution to be just good enough to enable us to pick fruit, hunt wild game and get through an ice age. There was nothin in there about being able to perceive ultimate reality.
@@X-boomer no but u can explain the solar systems basically to a 12 yr old I learned newton's equations in 7th grade so the same way green describes huge equations and the connection to live experiment the basics aren't terribly hard to explain 😀
What a gift Brian Greene has. He can explain this kind of thing in ways that mortals like me can perfectly understand ! Thank you Brian !
I agree emphatically !
I agree. However, I wish he wouldn't say meters per second and then say miles per HOUR. It confuses my addled brain. 😉😅
Immortals are still perplexed.
@@rollinmark8952
Mm
Keep in mind that he is a mortal as well.
You have just witnessed a lecture on constant velocity motion and special reatuvity that will never be surpassed! Professor Brian Green has got, to be, the most brilliant and erudite educator on all aspects of physics, the universe, cosmos and quantum physics bar none, His enthusiasm, clarity and techniques of getting his message across is absolutey phenomenal! Thank heavens for teachers in his vain. They are very few and extremely far between... We love ya Brian!!!
Best delivery of a time dilation explanation ever.
Couldn’t leave til the video finished, totally glued.
Awesome Dr Greene. Awesome and inspiring.
Time flows in a universal fashion everywhere and is not subjective. It's the devices used that are giving a faulty reading.
It's the gravitational fields that effect the instruments which is more than quite easy to comprehend...
Time is a standard unit of measurement that is fixed constant and is nothing more than a human construct.
Does an inch shrink or expand depending on gravity? No but in a sufficient enough gravitational field or lack thereof your tape measure will.
Dependence on Physical Processes:
Timekeeping devices, such as clocks, rely on specific physical processes (like oscillations of atoms in atomic clocks) to measure time.
These processes can be influenced by external conditions, including gravitational fields and relative motion.
Flaws and Limitations:
While these instruments are incredibly precise, they are not infallible. Their readings can be affected by various factors, including gravity, temperature, and even electromagnetic fields.
Thus, any variations in their measurements do not indicate a change in the fundamental nature of time.
Gravity's Influence on Time Measurement
Gravitational Time Dilation:
As established in Einstein's theory of relativity, the presence of a gravitational field can affect the rate at which timekeeping devices operate.
Clocks in stronger gravitational fields (like on Earth) will tick more slowly compared to those in weaker fields (like in space).
This is a result of the physical effects of gravity on the mechanisms of the clocks, not a change in time itself.
Consistency of Time:
The concept of time as a constant remains intact. Regardless of the gravitational field, the underlying flow of time does not change. It is the instruments that are influenced by their environment, leading to different readings.
Subjective vs. Objective Experience:
While our subjective experience of time may vary based on circumstances (like being in a hurry or waiting), the objective measurement of time remains a reflection of the processes we use to observe it.
The variations in these measurements are due to the instruments and their interactions with gravity, not a fundamental change in time.
The tests and methods done to substantiate time dilation are fundamentally flawed and the exact same results can be replicated by exposing any clock to cold temperatures, Using the same flawed logic you could say that cold slows time down which would be another crock!
100%
Dr. Greene is a true national treasure within the realm of explaining complex physics to everyone, regardless of their level of understanding and/or education.
Give Albert Einstein the respect and credit he deserves for piecing all the concepts together, if, he hadnt thought of it himself.
He stole it all and still got it wrong. Einstein was a Useful Idiot just like this woke idiot and wrong about everything. Now you are dumber for watching.
“When kids look up to great scientists the way they do to great musicians and actors, civilization will jump to the next level” ~ Brian Greene
Turn on comments On Your Channel
Y u.
Einstein was a musician.
Many of us still do.
The majority of people though, oh well... Let's just say they are a bit simpler and leave it there, before someone takes offense at my words. :D
@@gerardcousineau3478 Einstein was actor, who played role of original author of his theories, while they were result of long process of groups of peoples who cooked them in back kitchen.
That is why he was not involved in group projects like Manhattan, and never be in proximity of others like he not became guide of any student for doctrate while working in universities. Many things quoted or attributed him to made image of him as genius, too much publicity is needed to conceal flaws. Things like his brain was bigger so more intelligent, later it proved that there is no such correlation. He done his thesis under Minkowski who was already working on relativity with others like Poincare, Lorentz to fulfill ideas of Maxwell.
The first book that ever properly made sense to me and got me hooked onto Physics is The Fabric of the Cosmos! Thank you Dr.Brian Greene. 😊
Now hooked come check out The Resonance Science
What a waste of money.
Being a science student and a teacher (in a different field) can vouch on the beauty of your arrangement of thoughts and delivery of the subject. I never grasped the theory of relativity as clearly as i did today. Imagine my concentration to have realised after 1:30 minutes of continuous watching.
Good job!
Thank you for sharing this. Brian Greene is just the best science communicator. Sometimes im so thankful for UA-cam.
Yes AMAZING VIDEO ❤️❤️❤️
Praise the lord
yeah Fantastic video. Brian is Ace . A brilliant teacher and lecturer. x
I never went to high school. Theoretical physics, subtopics particals,, quantum theories attract my imagination n I'm so grateful these videos explain so much of the questions I've been asking myself for years.
Do not worry, even if you would have gone at high-school, the rotten teachers and fked up no life kids who's parent never bothered to help them make a difference between right or wrong and much more, would have sucked out everything good from you, just do you and learn now with the tech at hand, what you really like, every word every sentence you Don t understand from these kinds of videos, just search them and see what they mean, memorise it and go on to the next YOU thing.
I know what you mean. I left school without finishing grade nine to go to work. UA-cam is school these days. I remember having to go to the library to look for things I wanted to learn and even that in itself was a challenge. Now in just a couple minutes I have a choice of ten specialists to choose from to show me what I want to know. Such a wealth of information.
What is theoretical physics to you? What counts as gravity and a valid theory for gravity?
You were great in Rocky.
university = memorize training center
bring something new to the science : )
The visuals are incredible! I can listen to Brian Greene for hours but these visuals are really next level 👏
Hi. Prof. Brian Greene. In the beginning, recently, I watch your program by chance. But now, I am hooked and become your staunch follower. Your lectures are very interesting and enjoyable even for someone who does not have any background in physics or cosmology. I feel you are giving lectures on cosmology like reading a poem. I love it, sir. I am watching from Thailand.
I am somewhere watching between the East and the West: relatively in relative world views consideration for "change" vs. for measuring what is the highest value cross culturally or what it means to "know" something (epistemology), Orr what is logic as understanding "process" by the axiology of our values as may be seen by the cohesiveness of the group herein as astro physicists non-technically!
The major world views hold axiology to advance questions of what is the highest value cross culturally, what does it mean to know something, snd what is change, and what is logic. The psycho linguistics in aspects of cultural differences suggest the Whorfian Hypothesis ststes that no two people have the same view of the real world view in the same way unless their linguistic backgrounds are similar. The Mustrician Hypothesis goes deeper to suggest that Man has to rationalize his existence and does so through linguistic orientations. Perceptions abstract information within human ranges potentiated by technology herein as astro physicists to chase light. Our puny brains have abstracted therein the s Standard model being a theory for s partical physics requiring CERN is the top of the arts and sciences. Here process for our world view defines technology.
@@tommustric2492 has anyone told you you’re insufferable
@@h4f3ou5h bro said a whole lotta nothing
From the Philippines
The difference between a poor student and a brilliant one is the teacher. Brian was not only a brilliant student, he's an excellent lecturer.
I read " Brain is not only a brilliant student..."
@@E-Kat yea got it..👌
You should tell that to Kanye
That is really really not true. Every theoretical physics student does not have a great teacher. In fact most of us have really shitty ones. But we get by just the same.
Td y target TX us to be there terraria u trusted TX TX uq to tfx to make the list yesterday you know it yet registry
From my perspective, the most amazing aspect of this lecture is that if forces you to rethink your entire concept of reality. At 74, it’s not so easy.
Same here, but I'm 83 so time here is different.
Ya same and im 103
I at 77 too am impressed.
Brother, I've been following you for 16 yrs. This is by far your most susinct and penetrating lecture. Bravo!!! Thank you.
I'm watching from South Africa, Durban. I am enjoying your lecture, I'm going to actively seek more of your work as you have a layman's way of explaining rather complex scientific concepts
I’m starting my junior year as a physics major this semester, and while I’m used to seeing all these crazy equations that we have to try and solve like Schrodingers, Lorentz Transformations, etc, it’s nice to be able to clearly and simply understand what exactly I’m trying to solve rather than being fed all these letters and numbers and being expected to be a master of special relativity or quantum mechanics and the like. Thanks Brian!
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@@mattpiercey6130 what
Yah. It is nice to give the equations a narrative. All of these people saying they would have a PhD if greene was their teacher have no idea about the math. Then you take quantum mechanics and it is downhill from there.
Pp
Time keeps on slipping. ...into the future.
Thanks u for this.
One of the best videos on internet... I came here thinking let's watch 10 minutes, you held me captive throughout the session.. I just hope time ticks slower on ur 🕒 and u get lot of time to teach many people...
Great metaphor. Live long.
Don’t try to prove the metaphor though.
Sir, you are one of the few persons who actually make one love physics.
Thanks a lot sir.
@Enter the Bragn’ what is it then?
Enter the Bragn’ You are so stupid...
Enter the Bragn’ You don’t even deserve an explanation
@Enter the Bragn’ if space and time is one - and space is something physical then surely it qualifies as "physics" by your own definition, dosent it? Idk are you looking to distinguish the difference between physics and theoretical physics?
I'm just eager to understand🙏🏼
@Enter the Bragn’ ive been searching a little around and is still confused but i found the claim -
"In physics, spacetime is any mathematical model which fuses the three dimensions of space and the one dimension of time into a single four-dimensional manifold. ".
so its a type of model within physics but not actual physics because of only having physical attributes? and if so, what category does it then fall under?
The more I learn the more I realize how much I don’t know. I have three degrees and bunches of letters following my name, yet I know so little. Thank you Dr Brian…you are the best. I’m continuing to learn.
Life’s a journey. Knowledge is great. Increasing your knowledge is great. Learning is great.
That was precisely Albert's sentiments, until he met Mileva Marić 🙄
@@ultrakool 😊
As long as you don't have a "D" behind your name, that would make you very closed minded.
I’ve been learning stochastic and differential calculus for financial quantitative analysis and took a break to watch this video. I completely forgot myself for those two and a half hours.... I’d always heard of these equations and watched Interstellar several times but never really understood the concept with a high degree of comprehension until now. BRAVO man 👏 this was extremely spot on, and I can’t believe anyone would dislike the video. I never though calculus would come in handy in the real world until two situations in my life: 1-the decision to become a quant, and 2- my new found obsession with time travel and time dilation in general. To quote Family Guy, “why are we not funding this?!”
"watched Interstellar several times" next physicist of our time, folks
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Dr, Brian Green. You are the best teacher I ever had the pleasure to learn from. I am old but there were things I had trouble grasping. An now it is clear to me. I watch all I can, you are the only one who describes and shows results. Thank you. Ray Parker
Brian, I'm speechless. For the first time in 30 years, I get it. This is the clearest account of these ideas on the internet.
LOL. It’s the worst I’ve ever heard. But if it allowed you to figure it out then good for you.
His books are great
The more I watch these videos and ask these questions, the more I realize nobody really knows why. I've been beginning to accept the fact that it is just true and can be measured consistently. These are just properties of reality. I spent my entire lifetime trying to wrap my head around this stuff but I think today I finally get it. I can finally see forward and backward land.
Genius
Why: because it’s a lot simpler than not being this way. When quantized, it enforces particles be boson or fermions, with the latter being matter.
If I’d had a science teacher like Brian Greene I’d have a PhD in physics
Amen
no you won't.
You’d still have to write the exams, and know how to solve the equations ;)
But hey , I don’t know you. You may be very smart and good at advance math .
@@DHT2023 no she/he won't be PhD for sure. based on reaction to this very basic lecture she has no fucking knowledge of physics nor she could ever go to level where she can get PhD in physics. this very very basic entry level physics lecture.
@@amazingdude9042 u dont know wtf ur talking about
There people like Brian Greene ... and then there are flatearthers ... from within the same species. Fascinating.
Great observation, Einstein.
One just relies on the scientific process and the results of experiments ie. evidence.... and one just believes something based on? Our senses, memories and intuition cant be trusted... scientists know this... detectives know this... flat earthers are simply ignorant is all
@@djtbone001a 😂😂😂😂😂😂😂😂🤣
truth is what is repeated enough times
@@rolfjohansen5376 keep repeating that u have millions in the bank and see how that works out for you
Only If I had more teachers like this.
Your teachings are excellent.
I have never ever had a physics class like this.
My professors would always bully me with students.
Everyone needed a professor like him, someone who lives a good speaker and could keep you interested in the subject.
@@cynthiashepherd7754 Yes, indeed Cynthia Shepherd.
This man is just awesome...
When he teaches then space and time comes to a stop
Well Said!
@@bharatthosar yes mate
Enter the Bragn’ the reason why you say this is because of how stupid you are.
@@JudgeDredd_ agreed
Space stops?
Excellent lecture by Brian Greene!
I love relativity and now we have this precious video forever to watch over and over again. Thank you Brian!
Absolutely! I have in my 58 years feel 'Finally yeah thank you.
Brilliant
Thank you Brian Greene. Thank you. That was so eloquently explained and in such an entertaining style that, at least IMHO, you leapfrogged past Sean Carroll, in terms of communicating your craft to we others (less gifted), and in doing so you help to enlighten us all both now and, hopefully, our prodigy sometime in the relative future -- either through our sharing of what we just learned or via osmosis through our DNA to theirs perhaps. And think of how much better we inhabitants of this planet might be if we all could see it, and everything else around us, through Brian Greene's eyes. Not necessarily his perspective mind you (pardon the pun) but through his eyes. I do have issues with his perspective and interpretations at times but there is no denying his incredible ability to pass-on to us these wonderous things such as this which is shared in the lecture above. Again, thank you Brian Greene. Poles and barns .... lol. Incredible.
Through his eyes literally means from his perspective.
Amazing lesson and awesome teacher. I felt like I finally have someone who knows the answers to my questions before stressing a thorough investigation on my own paths. I still have so many questions on this topic, but I know now that someone like Brian Greene can just keep answering them so helpfully and usefully.
The speciality of this guy is that he can't think anything in a difficult manner. 🙌 respect him 👏 a lot.
I fall asleep to this all the time - I wish my brain would just absorb all this awesome info when I sleep but alas I still struggle to comprehend all of it! But Greene is such a good teacher that I am finally getting a lot of it!
I have popped the popcorn, flavoured the popcorn, baked the popcorn and right now I am eating the popcorn and I am loving this.
I wanna confess something, Brian greene's youtube content helped me get out of depression, honestly
Ditto!
I’ll be rewatching this for a while. Great lecture, I always enjoy listening to Brian.
I like his way of communication and also way of explaining things so simply.
.Brian sir.. your student from india🇮🇳🇮🇳
I'm also from 🇮🇳
I am from Delhi
🤟
I wish we were taught like this in college :(
We were mostly cramming things without actually understanding what's going on. This video is totally amazing!
Now go watch the 12 hour math version, what you would actually have to do at College
@@neonblack211 already know the math...explanation with physical situations were nice!
@@ritvikg that's cool... but you are probably in the minority!
Also I'm jealous I wish I was switched on enough to take the path of physics/mathematics in my youth
This is amazing. I am not even from USA or have any school in physics and I understand everything. Incredible speaker
He is brilliant, 73 year old here always trying to understand space/time
Dr Green and his lectures are simply amazing .Maneuverd through the different sections ensuring to cover presumably arising questions and visuals blend in precisely. Thank you Dr Green..
Coming to understand, isolate, and integrate the properties and applications found for Isotopes leads physics' in discovery.
Brian Greene is such a great educator!
Amazing I think I understand time dilation on high level now. Thanks, Mr Greene. What a treat.
believe me or not. while I'm sleeping i can still hear this. and in my dreams it's actually happening
😮
Me too
In the beginning of this video, my mind broke many times proportional to the tick tocks on the stationary light clock but progressively healed at the rate of the moving tick tock upon multiple viewings and that was awesome to build this foundation of knowledge , incredible instructor !
What a great teacher, what substance ,what clarity. God bless you Brian Green. Thanks from India
It's one of the greatest lectures that I've seen in regard to this topic. Thank you.
It may be sophomoric of me, but what I love most about Brian‘s examples and in particular this seminar is that he uses George and Gracie in his examples. And of course that would be George Burns and Gracie Allen. I encourage anyone who doesn’t know who they are to look them up on UA-cam and watch a few of their TV shows Back in the 30s 40s and 50s. Gracie Allen was a genius in her own right although she played exactly the opposite of that. But I’m so happy that he remembers them fondly enough to use them in his examples. God bless George Burns and Gracie Allen. Peace.
So well spoken. Never stuttered, never fumbled for a word, never restarted a sentence. Impeccable speaking on a most difficult topic. Likely an alien...
likely a conman.
@@papalegba6759 - Likely get what you are looking for. However this topic is hardly one that a conman could take advantage of due to it's factual content.
@@aleanufopilotftlcertified5663 'factual' lmao.
@@papalegba6759 - Factual as in actually occurring or based on proven concepts. Neither a conman nor an alien but a scholar explaining difficult to understand but proven realities in layman's terms. If e=mc^2 has been disproven I'd enjoy hearing about it from you. If you're just trolling, you need some better material to amuse and entertain with. Why are you here anyway? Most who view are trying to understand the proven correlation between space and time and matter but something tells me that you are not interested in advancing your understanding of these topics.
@@aleanufopilotftlcertified5663 e=mc2 has never been proven so there's no disproving needed. it's harry potter nonsense for plebs.
This is the best video ive seen explaining how time travaling is in some way, possible. this should be shown in classrooms
Brian Green inspired my love and passion for science.
Profesor Green Thank you for the photon clock example. Been wondering for 50 years weather time dilation was wrong or just all the examples were wrong. You provided all the math in so simple a manner that I could understand clearly that I had missed nothing as you proved clearly the problem. The light photon in each clock moved the exact same distance. Since it takes the exact same amount of time for both photons to move the exact same distance there was no time dilation only one clock was not up to the conditions it was placed into, so it reported 1/5 the time but your math proved that the clock was not reporting an accurate measure. Both photons traveled the exact same distance :)
Thank you so much for your awesome example and for doing the math in so clear and simple manner. Following up by showing this simple ratio was in fact in line with the fancy math let's me finally put this issue to rest. Clocks may fail but time is as consistent as photons are.
Amazing explanations....l still have to listen this a few more times to comprehend. Very good teachings . physics......not easy to grasp for me😮Thanks
Thank you Brian for giving me hope that maybe I’ll understand this one day. I’ll listen to this another dozen times and get back to you!!
I can listen to Sir Brian Greene throughout the day. The way he presents so complicated topics with simpler examples is so soothing. It is really fascinating to believe that we all reside in such a beautiful universe entangled with so vivid concepts
Damn I love Brian Greene. I could listen to him talk about .. I dunno... potatoes for an hour and be totally into it
Sorry my dearbut just keep on watching this kind of videos in the waite to see new things but still in most of this tipe are just the same monologe.
You, too? I don't even have an idea either. But still I watch this for more than 2 hours.
Can you imagine if we had teaches like Wal Thornhill !!!! I like Brian but he says the same old same of as all the others !!!
Stephen Hawk ing had handlers !!!If you sturdy his Dis ease you would realize there in no way he could teach a room of students or answer random questions from the audience...The questions were pre programed. The Vatican owns ALL telescopes (behind the scenes) They own L.U.C.E.R.F.E.R. the Most powerful on the planet. The Jesuits own all the "Foundlings' or hos pit als . The THE Big **** Theory was invented by a Catholic priest Along with "black holes"
give it two seconds of thought and you know what that really means !! The French refused to use that term because they KNOW !!! "Dark Matter" These ideas are over a 100 years old and its is regurgitated in every university day in and day out !!!
@@cloudleopard7695 I am a EU follower as well many others like Brian, what I like a lote about the EU is that they show a lote of pictures that help a lote in my study. - The EU is good but it wont make it at the long run with just PLASMA as well GR just wont stand with just GRAVITY. - We could make a MATTER CICLE same as the water cycle here in earth, matter is found in 3 states through out the universe, the first state is PLASMA which all stars are made of, plasma could be seen as the NEUTRAL STATE of matter, stars throw OUT UP light from all around which I call HOT LIGHT that to me may be seen as NEGATIVE MATTER, this light sooner or later will be refracted back to the systems DISK they came from at different ELECTROMAGNETISM LEVELS that the systems posses or have, the 3th state is the REFRACTED LIGHT that gets back as COLD LIGHT that to me is nothing less than what they call the CMB, the reffracted light is heavier than hot light so it makes a strongger down push than the HOT LIGHT up push so the difference in between is what it makes the little GRAVITY PUSH to matter from all around. - You might say that this is not enough to keep matter togather but know that matter through out the universe follows ATOMIC WEIGHT same as the light in rainbows, all matter falls down into 2 mayor groups which are the SOLIDS and the gaseous, this 2 sides atract each other reciprocally one to the other but cant mix at all but just a bit so is the fusion that creates HOT light to go UP but by the same time some COLD light is coming DOWN; the atraction is done from NORTH that are the gaseous or positive to SOUTH that are the solids or the negatives in CROSS SECTION, when this 2 sides encounter they form the system s DISK which is the NEUTRAL side where we practicly FLOAT in it so there is no need for gravity to be way to strong, pluss the atraction is done by ENTANGLEMENT like a ELECTROMAGNETIC BAND so the systems stay togather so stars in a galaxie dont flie away.
@@cosmopolitan4598 Compared to people like Michio Kaku & the great Carl Sagan (my all-time cosmology hero), he teaches some pretty advanced stuff. Talking on a stage to an empty room makes it difficult to engage the online audience, but he's really good at it anyway. I have a couple of his audiobooks, and I strongly prefer when he reads them himself.
(I admit, I nodded off during this.)
I'm in the hospital right now watching this. I'm not allowed to sleep at all this night for some tests they need to do in the morning. This is kinda helping me stay awake.
Has to be one of the finest explanations on Einstein’s relativity
Whats your best description of the gtor and the stor in a couple of sentences... ? How would you explain it to someone succinctly?
Brian is such a great teacher and speaker.
Great video. Thank you.
A P8riot 1 second ago
Is it coincidence Brian Greene is the spitting image of a young Albert?
briliant lecture. important knowledge, widely attainable, easy to understand. except for the log part, i was a little stumped. (it was 3am )
I can't believe I actually get to attend lectures from Brian Greene. The internet came along and provided an open invitation to the intellectual community. Some people use it to watch pointless crap. But others use it to attend lectures from the best instructors in the world. The level of education available to the public now is astonishing. I never thought I would understand the mathematics of Einstein, or ever take classes on relativity. But Brian Greene has taught me the fundamentals and it's actually crystal clear. I've even committed many of his equations to memory. And I'm glad to see so many other people who share my gratitude for having access to this information. You all give me hope. And by the way, Epstein didn't kill himself and Oswald didn't kill Kennedy. The internet makes it possible to come to this conclusion. Without the internet, we simply wouldn't know know the facts. The suggestion that Oswald killed Kennedy is ludicrous. I bring it up because I need you evidence-based people to actually look into it for yourselves. The general population has to be made aware of this reality before anything can be done about it.
I’m 😮
He explains it the best because he understood it the best
Q⁰
Sometimes we understand concepts perfectly well but have difficulty articulating them. So your statement that he explains best because he understood it best is not always true. Some people just have a gift of explaining things in a better way.
I remember reading the train analogy in The Elegant Universe and having to draw it out myself, I'm so happy to see this amazing visualization!
Dont fall asleep watching this i just had the most insane dream
Please expand 😆
🤣😂🤣
@@christosbereris5483 ive forgot most of it now but basically i found a way to travel through time and space and just did that for what felt like for days
Oh man, I totally understand; I'm always listening to lectures in bed & that shit happens to me all the time. 😂🤣😂
Oml family, my dream was super wild and i swear to you i understood everything he was sayin in my dream.
Congratulations to all of you who understood this explanation. The bouncing beam in the light clock broke my mind.
Flatearthers have to watch it.
I often notice that they don't understand relative speed and inertial reference frames.
Maybe this clip helps because he's explaining everything slowly enough with many even redundant examples.
I don’t even understand why anyone gives unreasonable people attention. Classifying then as flatearthers. These are just dumb people.
Amazing video, thank you so much WSU for putting this together for those of us who are less into the mathemathical side of it. Just one thing that I guess accidentally slipped in is the math for the Pole in the Barn instead of the regular explanation. I had to the switch to the 12 hour video for that one. Anyways, Brian Greene you are the best!
Thanks for your note! Btw, do you know where to find the explanation of the formula of Time Diff (=v * delta x /c^2)?
WOW, brilliant. He takes complex concepts and explains them at a level that I can understand.
Applying Causality to the speed of light is like watching the past in the south, turn around and expect to see the future in the north.
We are not even capable of observing the present.
Best lecture i have ever seen on special theory of relativity.
More is available on world science u
Such a great professor. He makes it easy to grasp quantum mechanics.
Simply put, the best explanation of timespace. Now I can pretend that I know a little about timespace
This is the most understandable and enjoyable time and space talk I ve ever heard thus so far. Thank you!
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For the one who didn't understand why the moving clock's time run slower, the velocity or speed is equal to distance / time, here the moving clock's light beam is travelling an extra distance so to compromise with that time of the clock must itself go slower (because if the velocity of speed of the light is always constant)
So if the plane flew in the opposite direction, then the clock on Earth would be the one ticking slower?
@@matthj9480 Everyone of us carries our own clock, that's the whole point.
Thanks for the great video, loved every minute of it. Brian Greene is a great teacher.
At 3:16 and he is such a great teacher. The key is to learn slow and in detail and with basics cleared / strong basics.
This is like brain crack.
I think I’m finally beginning to get it.
There’s so much more to see, think, and feel than our every day normal process of thinking allows for.
Even something as simple as thinking of the air as a substance instead of nothingness
Yup. This is the reason why most atheist look at science. When ppl say the "feel" or "intuit" something, it's laughable to those that understand. We don't perceive reality very well. We have a very micro view of reality.
If I'm late driving to work then it's ok because time is going slower. It's okay. We'll be there on time.
What a brilliant educator this man is. Thoroughly enjoyed this 2 1/2 hours. Fortunately I was travelling at close to the speed of light at the time :)
Thank you so much professor Greene. I love the way you explain thing
I love the opening, it’s literally wake me up.
I love how he explain things so simply... THANK YOU sir !!!
the professor is embodiment of selfless giving to people by giving up so much of his time n knowledge. thankyou
You've given me a complex when I hear the question "What time is it?" Now I have to give a long annoying dissertation on why I am not sure...
The Team Barn and Team Pole demonstration could use more introduction. Took me a while to figure out what Brian was talking about and why.
Definitely! They should give some reference in the description. I had no idea where it came from…
Amazing presentation. Very clear and no um's or uh's. A true masterpiece.
Einstein’s groundbreaking theories of relativity transformed our understanding of space and time, revealing that they are intertwined in a four-dimensional continuum. His theory of general relativity described how gravity is the result of the curvature of spacetime caused by mass and energy, fundamentally altering the way we perceive cosmic phenomena. This shift in perspective has had profound implications for both theoretical physics and practical applications, such as GPS technology. As we continue to explore the depths of space and the fabric of time, how might Einstein’s revolutionary ideas be expanded or challenged by new discoveries in modern physics?
I love Brian Green, I wish he would do videos like this on classical physics, I'd totally do the 12 hour math version
Thank you for this amazing presentation. Looking forward to the next!
I was just thinking im starving for a BG lecture when i saw this in my recommended feed. Perfect!
I was just thinking im starving for a BG lecture when i saw this in my recommended feed. Perfect!
Once again thanks for UA-cam and its content creators...access to videos like this are often more instructive than classroom college lectures on the same subject. Yes, I could do with less of Professor Greene jumping around on a stage, but that seems a small price to pay. No, this does not replace the in person experience of going to an institution of higher learning but what a boon to the rest of us who are no longer in school.
Thankyou so much sir.....our favourite special relativity course.
I read your books a decade ago and I'm so glad that you're now online doing lectures! Also, chalkboards have come a lonnnnng way in 30+ years!
Any idea what make are the boards he is using
@@rasmusverkehr4510 no idea
I like this guy so much. he makes it easier to understand. I wish I could do that
Am somewhere in Kenya, it's almost 2am at night, and am listening to this staring at the sky full of stars. Something isn't making sence somewhere. In Swahili, Space(Nafasi) and Time(Wakati) are two words that can be used interchangeably in a sentence. I shall rewatch tomorrow when am refreshed. I like how this guy explains stuff though.
The next time you look at the Starry Night, recognize that the Dark Space between the stars, the Dark Matter and Dark Energy, COMES from the stars. In the Raisin loaf analogy, it is the Raisins that are unfolding into their Spatial counterpart.
Look up, and see that the stellar matter (stars & galaxies) IS the Space in yet another one of its many forms. All for One and One for All.
Thanks a lot Mr. Green
Fantastic course, fantastic teacher. The best explanation I have ever seen or heard about Theory of Relativity.
Amazing information..excellent explanation..how calming..this is the lecture I search for beginning...love and respect 🙏 for every one who makes the beautiful video...thank you.
What boggles my mind is how in the hell could Einstein have had such an incredible insight! Dude was probably the smartest human who ever lived. Not necessarily in term of raw IQ, but his ability to make such improbable connections. And Brian’s mastery of not only the subject, but the language, allows morons like me to comprehend it.
I never seen why its taking this long to come up with new intriguing things to focus on that can give us further insight man
yeah, Brian G is a good professor and the dude is a really really really mesmerized by Big E! But here Brian did threw me a curve ball @ relative speed concept of 8m/s grenade if I 're to approach it @ 3m/s to as to what was otherwise thrown @ me 5m/sec
@@txlish These space/time talks drive me crazy. If a ball is thrown at 5m/s and you are moving towards the ball at 2 m/s, it doesn’t change the speed of the throw. It only changes the distance the ball travels.
@@kyle1562 velocity is not additive, but rapidity is. At slow speeds, they look the same to many digits.
@@DrDeuteron define “rapidity”