How Einstein Thought of the Theory of Relativity
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- Опубліковано 8 тра 2024
- In 1895, a 16-year-old boy imagined himself chasing a beam of light. This thought eventually changed the world forever. So how could one thought change the world so thoroughly?
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Script:
We cannot start talking about Einstein without discussing a classical physicist Sir Isaac Newton. In 1687, Newton published his book “Mathematical Principles of Natural Philosophy”. In the book, he described his three Laws of Motion and the Law of Gravity. His book is considered one of the most important writings in the history of mankind. After watching an apple fall, he asked himself a question. And if the apple falls, does the moon also fall? These questions led him to discover the Law of Gravity.
According to his Law of Gravitation, every object in the universe enacts its own force of attraction on another object. And this force is the reason why we are stuck on Earth, why the moon orbits the Earth, and indeed, why the universe exists. But that didn’t answer all of Newton’s questions. Like, why do objects attract each other? What is the source of gravity? And why does Mercury's orbit jiggle?
The rest remained a mystery until the era of Albert Einstein. In 1915, #Einstein published his Theory of General #Relativity, or in other words, his theory of #Gravity. In this theory, Einstein explained gravity and its source. He answered all the questions that Newton couldn’t, like Mercury’s precession.
Let’s take a step back here to 1905, to truly grasp where these different pieces of the puzzle come to life. This year, Einstein published his Theory of Special Relativity. It deals with the speed of light and the motion of objects. It was fine with non-accelerating objects, but the theory did not apply when gravity was present, or if the object was accelerating. He couldn’t quite figure the rest out. Until one fine day in 1907. He was observing a window washer on a ladder and had an epiphany.
He thought about what he would be experiencing while falling. He imagined himself there and realized that while falling, the ground would not be pushing him, so he would be in a free fall. That put some of the pieces together, but he still wasn’t fully finished. He began to think about falling again, this time he imagined himself in a room with no windows. On the surface of the Earth, you would weigh whatever your weight is now. But imagine if the room was in a spacecraft, moving in an upward direction with the same 9.8 meters per second squared as here on the ground. In that moment, if you were to weigh yourself, you would weigh the same as you do on Earth. Einstein realized that the observer would not be able to tell if he is on a spaceship, or on the surface of the Earth. That is because he would be moving at the exact same rate of acceleration. There would be no way to tell the difference.
This phenomenon is called the Equivalence Principle, which states that an object that is accelerating free of any gravitational pull is essentially no different than the same object that is stationary but affected by gravity. In other words, something moving in space with no gravity has the same mass as something on earth that is not moving. In his special theory of relativity, he could only deal with non-accelerating objects and the speed of light.
Let’s pause here for a second. This means that at that point, he knew how to unify his theory of special relativity with gravity. Luckily, he didn’t stop there. He did another thought experiment. This time he imagined what would happen if he pointed a laser beam from one side of the room towards the other. If the room were in a spaceship that was moving upwards with the same acceleration rate as earth, the height of the beam would slightly be lower on the other side of the room. As the floor moved up, it curved the light and caused it to bend down. But, this principle only applied in space. When he thought about the same experiment on earth, the light would appear to be straight. Of course, these two scenarios only happened in his brain. Let’s just take a brief moment to appreciate how brilliant he is to be able to conduct that experiment, all of that, in his brain.
Einstein wasn’t convinced though, as this violated the principle of equivalence. The acceleration of the room on the spaceship was the same as under the influence of gravity. The heights should be the same in both cases, so why were they different? He realized that the only possibility could be that the light beam must be bending under the gravitational influence. But how could this be? What does this bending of light mean? - Фільми й анімація
Einstein's knowledge was almost a century in the future. Truly amazing how he could understand and think about that. Takes an exceptionally open and creative mind to be able to do that.
And all in his mind, no less. Really amazing the human brain.
Not to mention his humility. Which for him was just being realistic and practical. He admitted that if he hadn't thought of that concept, it would be that inevitable that someone else would. He himself gave credit to Newton and a # of sharp minds that laid the foundation of understanding that he could build upon.
Einstein was a known weasel who was selfish. IMPORTANT.
@@twraoylnledyou8511 4:50 look at this and think again, he was smoking something to say these equal
Like it's not maybe because the rocket was moving!?!?!?!
We owe everything we have today (thus the easy life compared to 200,000 years ago) to a few brilliant individuals that greatly advanced human understanding. Thank you Einstein, Newton, James Clarke Maxwell, Marie Curie, Edwing Schroedinger, Tesla, Stephen Hawking and many others for getting us this far in a short time span! And rooting and cheering on the current scientists who are very hard at work to better humanity!
"If I have seen further than others, it is by standing upon the shoulders of giants" - Sir Isaac Newton.
We owe everything back all of human history. That era of thinkers were magnificent, however we couldn't have even had a society that allowed for critical thinking without Plato or Socrates. And by that logic, we wouldn't have had the ancient Greeks without the very first genius who discovered fire lol
Actually, many more than those white men are responsible for the present. The lady genius Noether, for instance, was instrumental in Einstein's theory formulation and has become fundamental in scientific theory construction but is barely known. I remind you of the movie, Hidden Figures, as well. Our history books are scandalously propagandistic owing to a stubborn white male supremacist legacy.
@BogdanM - Good point to bring up.
> The general misconception that all of humanity (me & you) are this genius species, when infact we are nothing more than just master > COPYCATS Schools are large *Copycat* centers we all go to for ⅕ of our lives, so we can go on mascarading as geniuses, which we really are not. But we will continue to pretend because it's better for our minds.
- Like the diehard fans screaming & letting everybody know that;
*"WE* won the Superbowl !"
Right; *"WE"*____, & not just the team on the field.............
Or to ended..
Project Manhattan? Anyone?
Minkowski doesn’t get enough credit..
I have watched so many videos explaining Einstein's Theory of Relativity. I have found your explanation to be the best. Simple and concise. Thank you!
Great to hear!
Yes, I too felt the same. Thankyou
Agree! Feel the same.
He video refreshes my memory of Halliday and Zemansky
The explanation in this video is by far the best of all the videos present on UA-cam on this topic.
What’s most impressive about the original ideas and theories of these great thinkers, is that they proved these things without ever even going to space. They understand the rules but never needed to leave the earth to test these theories, which just shows how open minded their ideas were. They found ways to test their hypothesis’s with their feet on the ground. Much respect
It's interesting how Einstein's theories all tie together. More interesting the fact that he was able to come up with his Equivalence Theory before man had even left the atmosphere. It goes without saying, but his intelligence is one in a millennia.
YOU ARE A FOOL TO SAY LIKE THIS
Edit : this is probably wrong:
4:50 you really think these two events equal?! I mean THE LIGHT LOOKS LIKE THAT BECAUSE THE ROCKET IS MOVING, on the Earth objects don't move
@@hehe_-_hehe a few problems here u have which is u dont understand what gravitational acceleration is and u dont understand that the curvature of the light in that thought experiment has a curvature so small that it might as well be a straight line but when it is amplified over a distance of a few million/billion kilometres the light will bend.
Tldr the higher the gravity field strength, the slower time is.
For example is like in the movie interstellar when they went to a planet near a black hole which have a very powerful gravity field strength, it will affect the time on the planet. That is in the vid they say that people that live on the iss experience time faster even though since time is dependent on gravity. Fyi it is just a few seconds
@@lumi5056 For me I know that the theory is wrong because space cannot bend and time is.. It is just an illusion of things changing, it cannot be a dimension!
There are another reasons
1. What is in This video makes no sense at all, a banana does not equal an apple because they are fruit and you cannot make your own logic to prove anything
2. Remember that show on national geographic? The train. When he said "not if light moves at one speed" that shows the whole scam, he treated the scene like they all see the same beam of light! ..imagine it yourself you will know that it is impossible for the two persons to see the same beam of light, if you imagined it well you will say where is the theory in that.
3. What do you think charges and fields are? Just it and go on??? No!
There cannot be a thing like that! World is not maths!
All who say I understand that no-theory are just who read only, then you come up with problems like dark matter, spooky action at a distance and big bang!
All of these came just to try to fill the gaps.
People who believe this are the same who believe dinosaurs and that pyramids are burials! And that we are in an advanced era
I will say it for once, Time is just an illusion of things changing, space is not a thing that can bend, there are no fields on its form like that. Do not accept what tries to just make a way to define reality, but only accept the truth.
AETHER! ua-cam.com/video/CHrOn2at8Ec/v-deo.html
@@hehe_-_hehe Sounds like you don't understand what you're talking about
Holy shit 7:25 my eyes finally opened now I understand!
I knew about light bending and I knew that despite the bend the speed is unaffected which is cool but what I JUST learned was from the way you said “time must slow down” then I clued in to gravity’s effect on light, speed, time is all connected! Finally I get it thanks. I watched so many of these and I’m aware of time dialation and all that stuff but I never seen such an easy visual representation.
We all learn something new everyday!
Can i just mention for so long I struggled with understanding Einsteins Theories ive read and watched so much material and all I can say is that this video helped me tremendously. You simplified it in so many ways and i find myself processing information differently and connecting all his theories together with your help! Your channel is so criminally underrated. Ive watched so many of your videos with understanding so much knowledge thank you so much!
Einstein was a rare breed genius who somehow managed to outperform all the other genius of his time. Even 100 years after his theories, we are still verifying and founding everything correct. He has given so much that, it looks like for the next 100 years we will continue to do so.
A careful study of the Vedic literature reveals that the concept of relativity, especially the time dilation, had been known before it was postulated by the modern physicists.
“The Bhagwad Geeta”, the famous Hindus scripture has a shlok in the 8th chapter verse 17. It is as follows:
सहस्रयुगपर्यन्तमहर्यद्ब्रह्मणो विदु: |
रात्रिं युगसहस्रान्तां तेऽहोरात्रविदो जना: ||
Pronunciation:
sahasra-yuga-paryantam ahar yad brahmaṇo viduḥ
rātriṁ yuga-sahasrāntāṁ te ’ho-rātra-vido janāḥ
Translation:
By human calculation a thousand ages taken together is the duration of Brahma's one day. And such also is the duration of his night.
It clearly says that the time is relative, which is the base of the Theory of Relativity.
@@AmanVerma-qh9jv it does not show time dilation but rather talk about cosmic year. Get some sci nce classes and then talk
@@sumeetghai8867 I was just saying that the idea of time dilation was known earlier too.
We could relate the scientific facts and the incident mentioned in scripture. King Kakudmi was in a relative motion with rest of the earth while he was travelling to Brahma-lok and returning to earth and was in a different gravitational field during his stay at Brahma-lok for a short while till his conversation with Brahma. Which led to slower his clock from rest of the world and meanwhile 27 Chaturyug passed on earth.
Here, one may ask for the archeological evidences for Kakudmi, Raiwati, Baldeo or Kushasthali, but the archeological evidences are of very less important for me. I do not much bother for the historical evidence, the concept is important for me. By this incident, it is evident that the writer of Shrimad Bhagwat Mahapuran was well know of the scientific fact - time dilation.
One may inculpate here saying this a work of speculation or coincidence, but certainly it is not as another similar incident is mentioned in this book. In 10th Skandh, Chapter 51, Shloka 14 to 19. In these shlokas it is mentioned, Muchukand an offspring of Mandhata; another scion of Ikshwaku; was travelled to Devlok to assist them during Devasur Sangram (war). When Dev got Kartikeya as their military chief, they thanked Muchukand and relieved him from his duties. Muchukand returned to earth. Meanwhile on earth no one present of his time. All his relatives were a matter of past now. So, he decided to sleep in a lonely cave.
It proves that these stories are not at all a coincidence but certainly the writer is aware of this complex phenomenon of time dilation. Amazing scripture!! Amazing theory.
At the last, I am compelled to write, we must have to read the scriptures with a scientific view. The events and incidents written in these scriptures to be thoroughly examined. If the incidents seemed to be unscientific as per modern Science, we must do intense research on those, perhaps we could add a new dimension to modern Science with a new discovery, invention.
@@AmanVerma-qh9jv inter celestial travel is never a possibility because even the most nearest galaxy is 3. 5 millions light years away. Secondly time dilation does means time slowed down it slows only with relation to the observer. The dilation effect is so miniscule that you hardly feel it. It has nothing to do with inter celestial travel and its not even a possibility keeping the fact in mind that nothing can travel faster than the speed of light that is 3*10*8. So all these excerpts are added later jist to give it a scientific bend but have 0 credibility as there cant be any peer reviews or evidenve to support sich claim
@@sumeetghai8867 bruh that's just an imaginary story, not a scientific research.
Also, if someone goes ( let us a say) to a planet which is revolving around a black hole having velocity greater than that of earth. The time will be slower there...
The explanation in textbooks and places on the web made me misunderstand/misinterpret what Einstein meant. Your explanation was clear. Thanks 💚
Finally I understood something about time dilation and gravitational lensing.
Thanks man.
AMAZING VIDEO PLEASE MAKE MORE I FEEL SO ENCOURAGED AND FASCINATED
The best explanation so far on Theory of Relativity in plain English.
Great educational video. Love the aesthetics of the editing!
This channel is criminally underrated. It deserves so much recognition. Thank you so much for bringing complex physics to general population.
Yeah true
#BackOffIndia Dhoti out!
@@machomanrichards1534 What did we even do? Why do you whites hate us so much for absolutely no reason?
@@machomanrichards1534 wtf is that!?
@@AmanVerma-qh9jv dhoti out😂
Wow this video gives the best and clear explanation than any other videos on the internet about this topic..! Thank u
Very good 🤗. Thanks Subscribed!!!!! I am watching science videos more than 6 years. I never stop. This video is very to the point. No extra or irrelevant points
Very well done! Congratulations. More videos like this. Thank you!
Cool animations! Loving the thug life Einstein 😆
You have explained this very well. I have watched many videos on this topic and yours hits the mark. Thank you.
Best video on UA-cam describing Einstein’s theories
Another knowledge to consume this morning! So cool! 🕵🏻♀️👩🏻💻❤️
This IS the simplest and clearest explanation of Einstein's Theory I have ever heard.
Dear sir.. You explained in a marvellous way.. Hats off to you... Thank you so much sir
The best and simplest explanation I have ever found so far!
Awesome video! I understood to some degree each of Einstein's theory separately but you helped me understand better how they tie together
Just discovered your channel its very informative. Keep the good work buddy 😁✌️
Your channel deserves much more subscribers......i am sure in the near future i will be congratulating your channel when this will happen!
Very simplied presentation. Hats off to you ❤️❤️
Great job Harry .. you took the explanation of a fascinating and extremely difficult theory of relativity and made it a bit clearer for me. thanks for that.
Glad it was helpful!
Lies again? Think Reality
Thanks for making contents like these! We will support you in anyway man! Knowledge never ends, MUST KEEP LEARNING :)
The best explanation amongst ALL the other convoluted ones on UA-cam!
Great video with excellent visuals. Looking forward to more.
After watching plenty of videos finally able to understand this theory in simple words.. thank you very much sir🙏
A careful study of the Vedic literature reveals that the concept of relativity, especially the time dilation, had been known before it was postulated by the modern physicists. For example, Text 8.17 of Bhagwat Gita [2] reads: “By human calculation, a thousand ages taken together form the duration of Brahma's one day.
“What we mean by relative motion in general is perfectly clear to everyone. If we think of a cart moving along a street, we know that it is possible to speak of the cart at rest and the street in motion, just as it is to speak of the cart in motion and the street at rest. This, however, is a very special part of the ideas involved in the principle of Relativity. ”
“It would be fun if we read this in a comic book journal, but when Professor Einstein says this in a lecture at Princeton University, we're supposed to not laugh, and that's the only difference. It's silly, but I can't dismiss the matter with this observation and therefore I will answer very seriously that it is only possible to speak of the street moving while the cart stands still - and believe - when I walk away from the whole experience of a lifetime and I am no longer able to understand the evidence of my senses; which is madness... Self-deception like this is not reasoning; it is the negation of reason; which is the faculty of drawing correct conclusions from the things observed, judged by the light of experience.
It is unworthy of our intelligence and a waste of our greatest gift; but this introduction serves very well to illustrate the kind of illusion that lies at the root of Relativity. When he suggested that the street might be moving while the wheeled cart was standing still, he was asking us to imagine that, in a similar way, the Earth we are standing on might be moving as the stars pass in the night. stop. It's an Appeal Case, where Einstein appeals on behalf of a Copernican Astronomy condemned against Michelson's judgment - Morley, Nordmeyer, Physics, Fact, Experience, Observation and Reason. ”
- Gregard Hickson, “Kings Dethroned”, p. 65-66.
Yeah except it's absolutely not silly, physics Is about describing reality with mathematical laws, If imagining the street Is the One that moves allows to descrive the universe then it's absolutely valid physics.
Sir,
Can we introduce two carts in opposite direction.
Regards
Ur content is extremely underrated , im in love 😍
Excellent explanation Sir! Thank you so much for this!
Nice video guys. Very nicely made I have to admit. The host was so calm with what he was supposed to explain and the video didn't feel too dragged because of the good explanation. Keep up the good work. 👏
Videos like these re-ignite my love for science.
Charozzzz...
Neatly explained in simple words. Brilliant video. Thank you.
Thank you Harry for making it so simple, Loved your video
Unbelievable how Einstein could go that deep into his mind..a though experiment..a theoretical physicist like no other..by uplifting Newton's great work einstein seen to be create a quick worm hole to the then nascent quantum world..awesome story telling thankyou🇨🇦
I probably watched a hundred videos but this is the time i say i understood what it actually means. this was the simplest and best explanation i found so far .
Loved it
i is not a word Einstein
One of the best explanations. Well done, congratulations and thank you.
Wow it such a good explanation even we already know! Gravity it seems simple when we understand it now, but was amazing when Isaac found it, we need to ask ourselves a right questions!
"If I have seen further than others, it is by standing upon the shoulders of giants" - Sir Isaac Newton.
Just as the giant leaps today we make in science are made possible by Einstein, his leaps were made possible by others, and theirs by others, and so on. We couldn't have made it to where we are without ancient people like Eratosthenes, Gan De, up to Gallileo and Faraday. Hell, without Plato and Socrates, we might not have even had a society that allowed for critical thinking!
Perfectly stated and absolutely true. No single human intelect could have done it all.
Yeah all Westerners must thanks to ancient Indian texts from which they stole scientific concepts!
Well, I've heard that without Socrates and Plato we would be still painting our faces blue and climbing trees here in northwest Europe today...
True?
@@nicolasbouyiouclis4726 no, they were in the time of romans and the romans where highly advanced, i think we would live in the dark ages
@@mr.z6887 what do you mean (no)?
Firstly the Romans [founders Roman and Rmilos] were the decedents of Hellenic migrating people originated from the Hellenic cost of Ionia, today's western turky..
Secondly, everything the Romans "had" was passed to them by the Greeks...
..remember the Romans [for their reasons] invated Hellas [Greece] but, the Hellenic people conquered Rome with their smarts and their highly educated people..
So, one can say Greeko-Roman period... but you can't take any of today's western countries or intellectuals and connected them to Romans.
Sir Newton said it best.. "he could see far because he was standing on the shoulders of others"...
Very Knowledgeable videos..Liked it 👍
You are the only person who could help me understand Relative theory. Even after seeing 5-6 videos I was quite puzzled. You explained it really well sir. Thank you for this video😊
Great explanation, even i have seen many similar videos, but this one is one of the best.
I really like your commentaries.You present complex concepts in a way that makes them easier to understand. I just subscribed. Good job.
@Hello there, how are you doing this blessed day?
I love this channel!! Thank you for simplifying all this content. ❤
Damn that explanation is so simple but covers everything. Thanks man!
Really digging this channel. Thank you
Why am i so infatuated with this subject and trying hard to understand it?
I am 70 yrs old, Hated school so much I' sagged off' nearly every day/week, never took any exams and left at 15.
This video is very helpful. Many thanks.
Well, you have successfully explained relativity to me. Physics is interesting once more !
Truly wonderful simplified explanation.
The Best video explaining general theory of relativity found on UA-cam yet
Hi, as are tired science teacher, this person gets an A+ for this video. Very well done.
@Hello there, how are you doing this blessed day?
Clear, substantive and presented very well. Nice work!
@Hello there, how are you doing this blessed day?
Short simple explanation on the world's most complex principles 👍👍👍
Thank you so much 😊
Best explanation I've heard so far.
Dude I just want to say that out of all the videos I have watched on special theory of relativity there was always a small part that I never understood from the explanation of other people and videos, and I just want to say that your breakdown solved that question that I've always been wondering.. or should I say wondering how it worked! So good job on that bro I am now a new subscriber!
Imagination - is man's greatest tool.
Thank You so much. Very beautifully explained
Your explanations are the best!
Hope you guys enjoy this episode. Comment which topic we should cover next in our video. See you guys around!
What about how time dilation is perceived by a 4D being?
Greatest unsolved mysteries of the universe!
How about the double slit experiment?
Video was informative, thanks
Actually he didn't 😂😂 he stole the theory from Vedas...
It’s incredible how from one coincidence to another, that the universe would create a being that can gaze upon its endless mystery’s
Well that's how emergent Intelligence works. We might build AI which can uncover the mysteries of the universe a billion times faster in the future. The universe is a giant evolutionary being, starting with no understanding of itself and finally fully understanding itself by itself.
Harry, excellent job. Congratulations and thank you.
Excellent video... probably best ...
Can u please make detailed video of each of theory with explanation of how he derived... also he had to take consideration of length dilation.... please explain y
Thank you for the wonderful video. Physics was one of my interest from childhood and the greatest scientists like Einstein, Newton, Planck hold no exception. Every time when I hear their astounding achievements that helped us to view the way the Universe functions , it always blows my mind.
I never get tired of watching videos About Genius Einstein.
Never
Thank you so much for this video...... Brilliantly explained
Bro you explained this in such an easy way to understand
To be honest, i couldn't understand for 4 years , what you do in only 10 minutes. Worth Subscribing. ❤
Dr George Gheverghese Joseph from The University of Manchester says the 'Kerala School' identified the 'infinite series'- one of the basic components of calculus - in about 1350.
The discovery is currently - and wrongly - attributed in books to Sir Isaac Newton and Gottfried Leibnitz at the end of the seventeenth centuries.
The team from the Universities of Manchester and Exeter reveal the Kerala School also discovered what amounted to the Pi series and used it to calculate Pi correct to 9, 10 and later 17 decimal places.
And there is strong circumstantial evidence that the Indians passed on their discoveries to mathematically knowledgeable Jesuit missionaries who visited India during the fifteenth century.
That knowledge, they argue, may have eventually been passed on to Newton himself.
Bro keep living in the past.
😮 thank you, thinking of these ideas puts things in perspective
First explanation that I can understand ! Thanks
Actually, special relativity worked with accelerating objects (Rindler's Coordinates), but it doesn't account the fact that acceleration and gravity are the same things. In other words, special relativity does not account for gravity in a non-inertial frame but it works fine with an accelerating object, Rindler Coordinate is one such non-inertial frame of special relativity which deals with accelerating object without considering the gravity (or the Ricci Scalar).
i think i didn't got your words
@@punishersofficial6184 don't worry.
It's called being normal? I'm with you.
@symo special relativity treats non-interial frame differently (F=ma), general relativity treats non-interial frame differently
From to equivalence principle; gravity=acceleration. (F=ma=mg)
Sawwa lakh se ladhawa special relativity 😍
@@jkshallinheritearth3883
Let us keep ourselves in limits of scientific debates.Bad mouthing of faith is not good in such fora as this.
Education is the manifestation of Perfection
best explanation for them subjects i have heard in ages,
man your video quality is insane.. awesome story telling .. love visuals.. cant get enough of this .. love your videos
7:43 There is a mistake: Time moves slower for astronauts on ISS, not for us on Earth.
Clocks click slower in gravitational fields relative to clocks in free fall or weaker gravity. The clock on the earth surface have more gravitational time dilation.
Yes, I agree.. Time is faster in the influence of gravity.
4:03 In 1915 there were no laser beams. Difficult to think that Einstein could imagine the behaviour of such thing. Even if laser later derived from his work. It was just a light beam he thought about.
Had the same thought-laser was discovered or “invented” in the 1960’s I believe. But the phrase “light beam” would have worked in Einstein’s thought experiment.
So simple so clear and yet deep
Thank you for easy explanation
Einstein in a way was an enlightened being
can you imagine seeing into the mechanics of the universe through your own imaginative reckoning???
Its unbelievable
amazing lecture brother you have a very good command on your subject.
this video made all my doubts clear. Thank you
I wonder if someone will be able to unify relativity and quantum mechanics during our lifetime. Would be an achievement even greater than Einsteins findings.
Thank You.
We are working on it ...
No kidding!
How could Einstein have “thought” about pointing a laser beam when lasers were invented after his death?
Hey, he was Einstein. If anybody could think about using something that hadn't been invented yet, he coulda! ... :)
Must've been a problem with phrasing but I think he was talking about the concept of a laser beam, which is an amplified beam of light travelling in a straight line at the speed of light. But another cool thing is Einstein actually came up with the concept of a laser (actually an acronym for Light Amplified by Stimulated Emission of Radiation) in 1916.
Professor knows everything, he knows laser beam would be invented, so coined the word b4 its even invented, bella ciao 👺
he thought of light beam.
A lot of things are attributed to Einstein Newton that should really be attributed to other scientists, humans love their big celebrities.
Good job, Harry. Thank you.
Excellent video about Theory of Relativity. Thanks!
The most important concept for me is to know that the speed of light stays the same, but it is time that changes.
7:06 at this point, he really confused me by saying “sun will bend the path and increase the distance from A to B and so the travel time will increase as well”;
Now distance rises, time rises so speed of light sort of remains constant right! So from where all those violations to theories come from?;
And it took so much pondering to ultimately realising and to convince myself that no matter the bending, the distance from A to B should remain the same and in order to maintain speed of light constant, time has to dilate!!
In theory then, if you could accelerate enough to counteract the gravitational effect would you minimise time dilation? Or is the mass created by the multiple objects and therefore gravitational effect in you path having such an impact that you would have to speed up and slow down in relation to the mass and gravity of each fixed point? E.g. put two weights of different amounts on the trampoline and plot a path past them with the marble in a straight a line a possible without being drawn to them, you would have be traveling faster to pass the bigger mass to stop the effect of gravity right?
Yes you just noticed orbital speed formula of objects.
great explanation - thank you very much, greetings from Poland
first time i actually understood the theories ..greattt
When they asked Albert what it's like to be the most intelligent man in the world.
Albert answered that he did not and that he did not know that, and that journalists should ask Nikola Tesla.
Tesla introduced us to the 21st century.
Not only that... He had a better explanation for gravity and he wanted to publish it. He had a strong critic opinion about relativity, because he wasn't agree to give to empty space some properties like curvature. Tesla's work about gravity is lost.
I wonder how many universes it took before one with just the right laws of physics for intelligent life to evolve?
Err ... One.
"Life evolves randomly" (this statement is just a over-simplified version of Charles Darwin's Theory of Evolution) So It would be really ego-centric to believe that life has only evolved on Earth.
Depends on how long it take before "intelligent life" destroys its host planet and goes extinct.
- I would be more inclined to speculate on just how many *planets* ( r needed for an intellagence to pop out of the mix).
- Our Universe is filled with a ridiculously large number of planets. So *"Universes"* is a bit much.
- Theory speculates that there may be as many as 10×⁵⁰⁰ Universes ( Thats 1 followed by 500 zeros) in the > Existance Domain < Each with a different set of values for the fundamental constants.
- But only " 1 " has the right values for all these constance to produce life, much less intellagence.
1. it's safe to assume that there are trillions of habitable planets in the entire universe
Keep up the good work!
Really great presentation,soothing not soo loud voice and cool bgm's