What I really appreciate (besides the content) is, that no music is played during your talk to make it seem more impactful. You just don't need music and I can listen 100% to your words. Thank you.
I have a question about elementary particles such as electrons as well as various quarks as well as neutrino particles As well as the article and antimatter Like the anti-electron positron And also the counter quark The question is about why these particles differ in rotation, mass, and charge We hope you find smart plans to reveal the secret of the difference between the elementary particles Was the difference between the particles due to the difference in the proportion of energy in the universe? Why are the primary particles different in mass, charge, and rotation? The third question Are there smaller molecules responsible for this difference? Please communicate my three questions to physicists
@@لقطاتمنالأنميالقديم You should ask the question on the video, rather than as a reply to a comment. You've got lots of excellent questions, and I'll bet this channel has already answered several of them in various videos, and will continue to answer them over time! I'll recommend Fermilab's video titled 'Fermions and Bosons'. Apologies if the formatting came out strange, UA-cam's text-entry field can't decide which language I'm typing.
Dude. SO AWESOME seeing you on PBS SpaceTime yesterday. SpaceTime and Fermilab (only because of Dr. Don) have long been my two favorite channels on UA-cam.
if PBS recruited this guy, then you can rest assured he is completely full of shit and serving you atheist leftwing propaganda....and yes, politics are still involved with astrophysics...because politics is down stream from culture and culture is down stream from psychology and psychology is down stream from associative logic foundations.
@@kathylynne8872 then get out of here. If you don't believe a particle physicist from fermilab you're a moron. You should probably go watch your flat earth conspiracy theory bullshit. That suits you.
Great stuff as always, one thing I would add is the misconception of the "before" the big bang people often have as well. Time-space is not a separate phenomenon so when space is condensed to a tiny speck, time also behaves differently and so time very likely began with the expansion itself. There most likely was no "before" the big bang as time simply didn't exist.
There must have been some crazy time dilation shit going on at the BB. All that mass in such a small volume? Also I've never got to grips with how did our Universe escape from it's own Schwartzschild radius ?
Not really; space and time coordinates exist depending exclusively on what atlases can cover a given manifold - whatever it may be. The thing with cosmology could be better put this way: if there was a 'before' the BB, we wouldn't know, because time is kept by clocks made of matter and all matter was bunched (classically) inside a singularity
Fantastic explanation. Your accent is clear and straight forward, your pauses and speed of delivery is precise, there are no musical disturbances, your body language instills confidence in the audience and the l lecture is so splendid. I can listen to you endlessly. Fabulous. I'm bent on learning a lot from you, sir.
Surah Al Anbya {21:30}The Noble Qur'An:Do not the Unbelievers see that the heavens and the earth were joined together (as one unit of creation), before we clove them asunder? We made from water every living thing. Will they not then believe?
@@dennisdejong6540 the big bang has no evidence evolution has no evidence none of it is sicence. Sicence is observable and testable no one can observe or test the big bang as for evolution no one has ever seen one animal produce a different animal it's never happened. It's all beliefs its religion
I have a great interest in this sort of thing and thought myself fairly knowledgeable about it, and still learned a few things here! Thank you for this!
This really resonated with me too. Like when Ricky Gervais (not a scientist!) commented that science is entirely re-discoverable, like if 1000 years after humanity is wiped out all this can be plausibly reestablished, as a contrast to religious beliefs which may or may not be reestablished (I am easy either way on this, I just sense a vulnerability in the hearsay of more knowledgeably primitive humans).
Yes, the problem is that scientists don't admit when they don't know something. I read a book once telling me exactly what happened 10^-32 seconds after the big bang.
@@RobertsMrtn it was told you because you can't handle that at that time , I mean Mathematics. When you are at minor school when Someone gave you subtract 10 from 8 then you will be like it's impossible but when you go higher class then you know the answer was -2 . I think from above you may have got an idea how it works.
@@RobertsMrtn "I read a book once telling me exactly what happened 10^-32 seconds after the big bang." - What book was that, claiming absolute certainty under the guise of scientific knowledge?
If they know everything, it is no more science, it's religion. Science is about for what we have enough evidence. If not evidence enough, the question must be left open. Of course, climate science is different...
@A3Kr0n This Channel Has No Content. SPAMBOT! PBS Promotional SPAMBOT! Actually it's a Dr. Don promotional SPAMBOT that promotes PBS as it associates to Dr. Don.
@@TheMyguitarisblue Yes. No. Most humans reply when you accuse them of being not real. Most. Did you notice the video has no supporting data and "people" love it and call Doc Don the reason PBS is getting better?
I am 82; I am not a scientist. But I have developed a strong interest in it. Dr. Lincoln presents his key ideas in a clear, understandable manner. When I think of all the university professors that I had in under graduate and graduate school that mumbled, Dr. Lincoln is refreshing.
It might take a long time to figure it out because things are getting harder and harder. It has been over 100 years since Einstein's groundbreaking achievements. I used to read older astronomy books from the library when I was a teenager. So much has changed since then, incredible!
Even better: He doesn't claim all of them are his,BUT he's probably the best ať explaining them, which is far more valuable to me. Because IT doesn't matter how much of a genius you Are if you Are the only one. Mankind Is only able to move forward collectively, not as isolated individuals. That ship has sailed thousands of years ago.
@Dupa Essex It's how the left gains ground-they do it thru the legislative process by organizing what they want taught. That really should be left to educational experts.
@@kimlibera663 That's the Right doing that, Kim --- pushing anti-science Biblical "education" agendas, Creationism, library defunding and censorship. They're the force trying to dumb down America so they can take over.
There seems to be a disconnect between your wish for more science and your irrational political beliefs. Not meaning to make a No True Scotsman fallacy, but I find it difficult to see how anyone who values a scientific, evidence-based approach can fall for such obvious tribalism.
God almighty said ( Have not those who disbelieve known that the heavens and the earth were joined together as one united piece , then we parted them ? and we have made from water every living thing . will they not then believe ? ) [ prophets : 30 ] . and said ( And the heaven We constructed with strength, and indeed, We are its expander).[ chapter 51: Verse 47 ] Those verses from holy Quran before 1440 years told about( The Big Bang Theory ) that we are studying it recently discovered . God almighty who created all the world he is only one God and he sent prophets and massengers Like Adam Ibrahim Moses Jesus Muhammad etc and revealed to them books like a book instructions of human bieng illustrates every thing we need to know .. Quran is the only book preserved from God from the past until now unlike another books hasn't been preserved .. so who wants to know truth of life he should read Quran to find the truth . Many muslims are not following instructions of God well like isis or saudia arabia king for example, so do not judge Islam by behave of muslims .. unfortunately also media highlights the bad people in Islam so a wrong picture has been made about Islam .. Islam in arabic means ( submission to God ) .
The Quran also tells us that, at night, the Sun hides in its resting place. If you want to learn how things work, read a science textbook. You're right that there are many negative stereotypes of Muslims. That kind of bigotry is shameful.
I have waited my whole life to find this video. I now feel happy with an understanding of the universe that I didn’t have before. Thank you so much for simplifying this complex topic for me
Double dose of Don in one week!!! I love your content and have a great appreciation for the work you and ALL of your colleagues do in the world of Physics!
"Well nobody was there at the time, so we can't possibly know anything" If someone told me that I would ask them, if your house got robbed and nobody was there at the time, but there *was* any kind of DNA to trace back to the culprit, would you dismiss it because simply nobody was there at the time? 0:37
Yeah I'm afraid people claiming this are never going to learn anything. So with that logic, there were no dinosaurs, right? Even though we found their fossils.
@Johnny Mnemonic Well, see, you are kind of committing a false analogy fallacy because we aren't talking about DNA when we talk about the big bang; We are talking about electromagnetic radiation from the CMB.
@Andrew Ongais Until new physics and math is created/found to develop these theories beyond speculation, we won't know. I mean I would like us to not have to stay beholden to c, so we can explore the universe at a more manageable rate. We just need better theories and better science to push us forward.
@Andrew Ongais it goes even deeper than physics, science cannot explain the simple, why do you chose to write on this forum? You intention cannot be broken down into chemical impulses of the brain. You have chosen to act and science cannot explain why.
Xmanx720 galaxy Same harem Logic that a buck uses in a field of does! Just for , let’s bucks just fighter out. Hahahaha Just entertaining OURSELVES! All $marta$$e$...
What really happened at the Big Bang? NOTHING ! Because nothing can NOT create everything ! An explosion will never create anything ! Use your brain for 30 seconds before going back to sleep and believe these pseudo-scientists and their lunacy. THIS IS BULLSHIT FOR GULLIBLE SHEEP... JUST THINK !!!
I agree because Earth is observably, provably and test-ably Flat. Even Neil deGrass Tyson said you cannot see the curvature of Earth from 120,000 feet up.
FINALLY! This is the first clear explanation of the Big Bang. I never understood how can be an infinite universe emerge from a single infinite dense spot called singularity. The answer is: it wasn't the case, just our current theory (Einstein's theory) can not describe it. Thank YOU very much. You are a very good teacher, sir.
God almighty said ( Have not those who disbelieve known that the heavens and the earth were joined together as one united piece , then we parted them ? and we have made from water every living thing . will they not then believe ? ) [ prophets : 30 ] . and said ( And the heaven We constructed with strength, and indeed, We are its expander).[ chapter 51: Verse 47 ] Those verses from holy Quran before 1440 years told about( The Big Bang Theory ) that we are studying it recently discovered . God almighty who created all the world he is only one God and he sent prophets and massengers Like Adam Ibrahim Moses Jesus Muhammad etc and revealed to them books like a book instructions of human bieng illustrates every thing we need to know .. Quran is the only book preserved from God from the past until now unlike another books hasn't been preserved .. so who wants to know truth of life he should read Quran to find the truth . Many muslims are not following instructions of God well like isis or saudia arabia king for example, so do not judge Islam by behave of muslims .. unfortunately also media highlights the bad people in Islam so a wrong picture has been made about Islam .. Islam in arabic means ( submission to God ) .
szarvasmarha My excitement exactly. I didn’t think the universe was ever a singularity or infinitely dense. And I never thought there was meaning in the concept of T=0. But here it was explained for me that the “observable universe” was the size of a “proton” but possibly existing within an unobservable and possibly infinite universe. And the Big Bang is what happened after inflation ended at around T=10^-32 secs. I’m giddy after this clarification.
@Henrik Wallin Are you an astrophysicist or a cosmologist ? NO ? Thought so. I wonder why you think you know more about their fields than them. There is this Dunning-Krueger effect if you ever heard about it, the point is, the less you know the more confident you are in that you know everything. Such a sad cognitive mistake, I see ppl doing it all the time...
@@SamGarcia No not memory, well yes and no, it is caching in sever memory(RAM doesn't store any permanent data whenever they reboot any given server for whatever reason, the memory gets wipes out, the game is expanding within a HDD or SSD.
Thanks for that. I wasn't sure what the difference between expansion and inflation was until now - I'd thought they were pretty much synonymous with each other (as a matter of fact/event, as opposed to being just words describing a similar concept). I really enjoy your talks, so please continue making physics understandable - at least at this level. I wouldn't dream of saying I understand it academically LOL. Cheers!
Really diggin' these presentations by Dr. Lincoln, going through most of them, I love that there's no music as well, a proper lecturer and makes it all easy to understand.
@@Cabolt44 It's a joke, but a serious joke. Far too many people approach science with a religious bias. I know that's not how the OP used the word, hence the joking part.
New sub. I heard about this channel from the colab with PBS SpaceTime. Your content seems easier to follow for us normal unedjumacated folks. Keep it up
Time is quantized, too. The Plank time unit is 10^(-43) seconds and prof.Lincoln says we can't know nothing betwee t = 0 and t = 10^(-43)s. A quantum gravity theory could help, but it doesn't exist yet
Wouldn’t it be more correct to say that the Big Bang is the expansion of spacetime? And as you go back, wouldn’t the increase in energy density cause time to dilate to the point where there never was a beginning? 🤯
Come here to ask this - kind of. At the speed of light and/or beyond, would the time component related to 'Earth seconds' be incredibly dilated? Trying to get my head around this in that at the speed of light, the universe would only be a few hours old from the light photon's perspective. 'Big Bang' was possibly only 'this morning'. Our cold energy that has dropped out of the speed of light and cooled to form matter is basically frozen 'in time' from the photon's perspective. This is way above my pay grade but a fascinating topic to learn about from reliable sources.
You actually just described a black hole! Indeed, a black hole singularity and the Big Bang "singularity" are the exact same idea, for the most part. From our reference frame far away from the super dense region (big bang or black hole), we never actually see the total collapse of objects. So, if we were watching the big bang in reverse from super far away, we would never see everything collapse that far (if that's what actually happened).
ANGRYpooCHUCKER Not the same thing. Black holes don’t expand and all the space of our universe lies within the space of the Big Bang so one can’t observe the Big Bang from the outside.
@@karagi101 That's one interpretation of the big bang, sure. But Stephen Hawking formulated his idea of the big bang singularity by noticing that it behaves awfully similar to a black hole. If you take a bunch of stuff (even the entire universe) and compress it down, you end up with a singularity (or something like it as scientists don't actually take mathematical singularities to mean anything physically). Also, according to some popular big bang models, the universe may in fact be infinite and all of the "stuff" that came from the big bang was just that: stuff. There was still space outside of that region. ALSO ALSO, even if that's not the case, there's nothing stopping us from assuming a reference frame outside of the big bang even if it does represent the entire universe. IF we do assume that reference frame, as Hawking did, then watching the big bang in reverse is identical to watching a black hole form.
Omfg, the existential horror of trying to grasp the nature of the universe pales in comparison to the nightmare that is looking at a yt comments section.
6:02 "Faster then light" is not a helpful piece of information, if you take two far enough points in a universe with any expansion rate the distance between them will grow "faster then light". Tell me the rate of doubling instead.
@@albirtarsha5370 If i look at two sufficiently close points in the universe, even in the time of inflation, the distance between them could grow slower then the speed of light. In addition, if i look at two sufficiently far away points in the universe today, the distance between them could grow faster then the speed of light. Basically, my point is that saying that the universe grow at a superluminal speed doesn't tell you anything about the intensity of the expansion.
@@eliyasne9695 True but that is not the case here. The distance (and time) is not arbitrary but is specified. The rate of expansion during inflationary period was very different from the current expansion. That is part of why it is so unique. During the inflationary period the expansion was so rapid that the tiny quantum fluctuations were blown up to a large scale. This happened because it was so fast. It was faster than the speed of information.
Love your videos. I do not have a scientific background. I only got through high school physics 40 years ago, but I enjoy expanding my knowledge of the world in which I live. Question: The inflation idea sounds wild! But, knowing how powerful it was, why did it last for only the briefest period of time? It seems like something this powerful would be difficult to stop.
Dr Alan guth from MIT proposed the inflation theory. In the 1980's . He stated, ( I am paraphrasing. ) the expansion was do to inflation where the forces .Weak and strong were moving faster than lightspeed. He than went to say the reason that inflation only lasted for a short time was do part of light coming into existence. So the reason why inflation didn't break the laws of physics.was light was not in existence. And once light came into existence it put the brakes on inflation.
Could the geometry be a flat embedded torus like you imaged here? Corrugations or wave functions would help correct curved distances of time and space.
Thank you for this cogent explanation. I have heard so many scientists use the term singularity and infinitely small or infinitely dense to describe the early universe, or black holes. Maybe they are just sloppy in their terminology. It always gave me the impression that they didnt know what they were talking about, or were treating the public like children.
then why do you believe then when they say they are certain about the big bang happening?
5 років тому
No kidding can you believe there are people who still believe we are on a ball. If that was true everyone in the souther hemisphere would be falling into space. Lol
HAHA! From an oldtimer computer technician (mainframes - troubleshooting at component level) - reality is infinitely stranger than loading programs into memory. Trust me.
@@robertsparkman8516 There are some computer dinosaurs still around.... HEHEHE. My first course was on Univac 1050. Germanium transistors. 32 k Core memory. 222 kHz clock. Mind you. Then other models, smaller and large scale.... Sigh! I was happy, and I knew that. . Are you also nostalgic of that era? I still work on IT, designing networks, data centers, and so on. Regards.
Totally agree. Proponents of the myths, often point at some aspect that science can't explain and then insert a god there, as if that makes more sense.
every theory on the origin of the universe counts as a creation myth, and I think it is rewarding to be curious on the origin. i realize you're prodding dogmatism, but it would be more interesting to know or to come up with theories than to be satisfied with a lack of knowledge.
Oh, I don't think so. Your "creation myth" starts out by saying, "In the beginning...." So Mike, how do you have a beginning? What starts a beginning? Wouldn't there have to be a prime cause that is ABOVE a beginning? How did YOU begin? What was the prime cause that caused you to begin? Wouldn't that be something above and before your beginning?
I always appreciate free thinkers, and anyone that doesn’t dogmatically follow the group think of pop culture. That being said, I paused the video and read those comments. And they are some of the dumbest responses I’ve seen. As a general rule, one should do some basic research on a topic before having opinions. That goes for science or even politics. Never just repeat what people told you. Look into it.
They are lacking knowledge required to understand the Big Bang theory. Unfortunately, it is the same knowledge they would need to properly assess their ignorance in the subject. The Dunning-Kruger effect in a nutshell ;)
Very true ! in a sense we all "were there" at the moment of the " Big Bang" but got "assembled " in our present form 13.8 billion years later . Wonderful !
God almighty said ( O assembly of jinn and mankind ! If you are able to pass through the regions of the heavens and the earth, then pass through; you cannot pass through but with authority ). [ chapter 55 : verse 33 ] One of a lot of verses from holy Quran emphasize the fact that there is one God who created the all world .. Our lord told us by his words in Quran revealed to his massenger before 1440 years that humans will go to sky .. If you want to know truth of life read Quran you will find the truth . Quran is a book of signs not science but has a lot of science in it .. like big bang , couples of plants , how the life begining , creation of humans , expantion of the heaven and a lot of signs in different fields in science no any errors or contradictions .. Before judging you have to study and read .. no body can just say oh you are wrong based on wrong informations from media or ignorance and misunderstanding , God gave us brain, eyes, heart and ears so as to use them searching for the truth otherwise don't blame only your self in day of judgment day of acounts .
Yeah, me too ! I had to put my hand over him to be able to focus 😁. I'm eye sensitive (don't know if this is the right translation 🤷) and the joined, arrowing fingers LITERALLY HURT my eyes 😕 But still, thanks to the Doc 🤯
I'm not a physicist, but every time I hear someone say that the universe started as an infinitely small singularity, my eyes roll. Explaining the big bang as simply expansion from a point with an unknown size makes a lot more sense to me.
I have a question. Was there a fundamental quantity of space and time that came into being with the big bang? If not, then where is all the additional space/time coming from? If there was an original quantity then perhaps it's thinning out as the universe expands? I am assuming that space/time has a real existence and that it is not an empty void but a product and function of the big bang itself. If this is the case then how is the universe able to add more and more space and time to the mix to prevent it from thinning into non-existence?
4:52 The big bang is the expansion but not matter moving through space? Im pretty familiar with all this stuff but im totally lost there, can you clarify that?
Expansion means that the distances between two points in space grow, without "actual" movement. It's a change in what the distance means, so the metric of space, not a velocity. Inflation was, presumably, a period of extreme expansion that is needed to explain some properties we observe in the universe, like why its so evenly distributed even at distances that couldn't have communicated at light speed if space had been expanding regularly. PBS spacetime have a video on that ua-cam.com/video/blSTTFS8Uco/v-deo.html
Think of a rubber duck on the surface of the river, with another duck held by someone near a river bank. The duck on the surface is not moving compared to the water, but it is moving compared to the stationary duck. That's because the water is moving. The expansion of space is similar.
Hi Dr. Lincoln - could you please make a video about the neutron? I'd like to know why it's so stable in the nucleus and why a free neutron outside the nucleus decays with a half life of about 10 minutes?
Hello sir, i really want to know an answer. I was studying Quantum field theory some days ago and i Google some stuffs about it and i read from BILL BRAY(physicist /Director at US Department) in QUORA that if there is fire by rubbing two woods, then it doesn't mean that fire was inside the woods. So how can particle physicist say proton is made up of Quarks just by colliding two quarks. And this thought made by ady worse. Please clarify that..
I don't get time such as "10^-23 seconds". Referring to a second now, or then, which would have been, hmm, slower, because of high density? Was the big bang then, (even at the beginning) just a slow fountain?
What I really appreciate (besides the content) is, that no music is played during your talk to make it seem more impactful. You just don't need music and I can listen 100% to your words. Thank you.
True. Some channels think they need background music and it's so annoying.
Edit: I love the intro music though!
Or we can add our own background music at whatever volume we prefer. I like having that power. Talks don't need music.
I have a question about elementary particles such as electrons as well as various quarks as well as neutrino particles
As well as the article and antimatter
Like the anti-electron positron
And also the counter quark
The question is about why these particles differ in rotation, mass, and charge
We hope you find smart plans to reveal the secret of the difference between the elementary particles
Was the difference between the particles due to the difference in the proportion of energy in the universe?
Why are the primary particles different in mass, charge, and rotation?
The third question
Are there smaller molecules responsible for this difference?
Please communicate my three questions to physicists
@@لقطاتمنالأنميالقديم You should ask the question on the video, rather than as a reply to a comment.
You've got lots of excellent questions, and I'll bet this channel has already answered several of them in various videos, and will continue to answer them over time!
I'll recommend Fermilab's video titled 'Fermions and Bosons'. Apologies if the formatting came out strange, UA-cam's text-entry field can't decide which language I'm typing.
I would appreciate the music from Star War. Don don don don don don don don , don don don don don don don don....bon bon
Dude. SO AWESOME seeing you on PBS SpaceTime yesterday. SpaceTime and Fermilab (only because of Dr. Don) have long been my two favorite channels on UA-cam.
Fermilab is better because it feels like him explaining something to his smart teenage grandkid between shifts at the antimatter factory.
if PBS recruited this guy, then you can rest assured he is completely full of shit and serving you atheist leftwing propaganda....and yes, politics are still involved with astrophysics...because politics is down stream from culture and culture is down stream from psychology and psychology is down stream from associative logic foundations.
I like the fact that he’s wearing a shirt that reference the show called the big bang theory and then has his own show about the Big Bang
Respect the man. He is a professor of high nonsense and can't prove anything he says.
@@kathylynne8872 Why are you watching these videos if you can't even grasp the concept of the scientific process?
@@kathylynne8872 then get out of here. If you don't believe a particle physicist from fermilab you're a moron. You should probably go watch your flat earth conspiracy theory bullshit. That suits you.
1AM in Lithuania... Me: A great time for some astrophysics!
1.30 AM Greece, same!
Same in Ukraine 🤷♀️
Poland here :)
@@kruasan1 Germany here, same. I love to hear Don talk.
Spookily enough it is 1350 here in the UK 14 hrs after the OP ;0)
Great stuff as always, one thing I would add is the misconception of the "before" the big bang people often have as well. Time-space is not a separate phenomenon so when space is condensed to a tiny speck, time also behaves differently and so time very likely began with the expansion itself. There most likely was no "before" the big bang as time simply didn't exist.
Dude I love your channel
There must have been some crazy time dilation shit going on at the BB. All that mass in such a small volume? Also I've never got to grips with how did our Universe escape from it's own Schwartzschild radius ?
Ya Stephen Hawking also said same
Not really; space and time coordinates exist depending exclusively on what atlases can cover a given manifold - whatever it may be. The thing with cosmology could be better put this way: if there was a 'before' the BB, we wouldn't know, because time is kept by clocks made of matter and all matter was bunched (classically) inside a singularity
But yet, he said the universe May/Perhaps have been infinite at the time of the big bang.
Fantastic explanation. Your accent is clear and straight forward, your pauses and speed of delivery is precise, there are no musical disturbances, your body language instills confidence in the audience and the l lecture is so splendid. I can listen to you endlessly. Fabulous. I'm bent on learning a lot from you, sir.
But what about the science?
I can’t possibly express how much I appreciate this channel. Thank you (times) infinity.
What, you want to remain ignorant? To get a good education, don't watch this nonsense.
@@kathylynne8872 gotta take your grumpy pills
This is brilliant. Dr. Don is an excellent story-teller.
I sometimes wish I could skip ahead 500 or 1000 years, to find out the answers to many of these questions!
Just travel 99.9% at the speed of light and come back in a couple years. You'll find out.
@@overclockin2022 Oh, yeah, like I can just hop in my spaceship and warp away. ;3
Surah Al Anbya {21:30}The Noble Qur'An:Do not the Unbelievers see that the heavens and the earth were joined together (as one unit of creation), before we clove them asunder? We made from water every living thing. Will they not then believe?
@@sohaibsbai6263 lol my muslim friend told me this same quote with land and earth. What about stars???
We all experience the beginning and we'll experience the ending. Or you can just time travel in your sleep
The more I learn the less I know! 😨
Possibly, to make you feel a little better about yourself, check out he "Dunning-Kruger Effect".
The less I know, the more I learn 🙂
That's the truth for all of us.
The more you learn, the more you know you have much, much, much more to learn than you thought and that's what make you a better person.
Me to buddy
Happy New Year Dr. Lincoln to you and your peeps. Love your content and presentation.
Me: "Yeah, I think I have a pretty good grasp on the Big Bang."
Dr. Lincoln: "Hold my beer..."
JFK to Lincoln: hold my brain. WTC to Larry Silverstein and Dick Cheney: what have you done?
No you don't. Nobody has.
No one has a good grasp of it. The THEORY is nonsense it's a tax payer funded religion
@@michaelking8061 well... at least not a religion, because religions seem to claim absolute truths without evidence.
@@dennisdejong6540 the big bang has no evidence evolution has no evidence none of it is sicence. Sicence is observable and testable no one can observe or test the big bang as for evolution no one has ever seen one animal produce a different animal it's never happened. It's all beliefs its religion
That's the clearest explanation of the theory that I've seen. So much misinformation out there.
I have a great interest in this sort of thing and thought myself fairly knowledgeable about it, and still learned a few things here! Thank you for this!
This explanation itself is misinformation. 🙄
@@micahwatson9017 how so?
ERICK PATRIOTA BRASILEIRO plot holes
@ERICK PATRIOTA BRASILEIRO you're funny. I mean, I _hope_ you're being sarcastic.
You and PBS, best channels in the visible internet !!!
@Net Syncs true...but we need the TOR derivation ;)
@1:41 "Scientists admit when they don't know something" I love this.
This really resonated with me too. Like when Ricky Gervais (not a scientist!) commented that science is entirely re-discoverable, like if 1000 years after humanity is wiped out all this can be plausibly reestablished, as a contrast to religious beliefs which may or may not be reestablished (I am easy either way on this, I just sense a vulnerability in the hearsay of more knowledgeably primitive humans).
“Scientists admit when they don’t know something...” Best burn today. 🙌🏻🙌🏻🙌🏻
the best burns were in 15th or 16th century when they burned "witches"
Yes, the problem is that scientists don't admit when they don't know something. I read a book once telling me exactly what happened 10^-32 seconds after the big bang.
@@RobertsMrtn it was told you because you can't handle that at that time , I mean Mathematics.
When you are at minor school when Someone gave you subtract 10 from 8 then you will be like it's impossible but when you go higher class then you know the answer was -2 . I think from above you may have got an idea how it works.
@@RobertsMrtn "I read a book once telling me exactly what happened 10^-32 seconds after the big bang." - What book was that, claiming absolute certainty under the guise of scientific knowledge?
If they know everything, it is no more science, it's religion. Science is about for what we have enough evidence. If not evidence enough, the question must be left open.
Of course, climate science is different...
Saw ya on PBS Space Time. PBS is really moving up in the world.
I see what you did there. 😉
@A3Kr0n This Channel Has No Content.
SPAMBOT! PBS Promotional SPAMBOT!
Actually it's a Dr. Don promotional SPAMBOT that promotes PBS as it associates to Dr. Don.
@@ZeroOskul Are you okay? Do you have brain damage? Surprise, most people on UA-cam don't make content, they just watch other people's videos.
@@TheMyguitarisblue Yes. No.
Most humans reply when you accuse them of being not real.
Most.
Did you notice the video has no supporting data and "people" love it and call Doc Don the reason PBS is getting better?
@@TheMyguitarisblue ding ding ding we have a winner
I am 82; I am not a scientist. But I have developed a strong interest in it.
Dr. Lincoln presents his key ideas in a clear, understandable manner. When I think of all the university professors that I had in under graduate and graduate school that mumbled, Dr. Lincoln is refreshing.
It might take a long time to figure it out because things are getting harder and harder. It has been over 100 years since Einstein's groundbreaking achievements. I used to read older astronomy books from the library when I was a teenager. So much has changed since then, incredible!
Even better: He doesn't claim all of them are his,BUT he's probably the best ať explaining them, which is far more valuable to me. Because IT doesn't matter how much of a genius you Are if you Are the only one. Mankind Is only able to move forward collectively, not as isolated individuals. That ship has sailed thousands of years ago.
They need to emphasize more earth science in high school.
@Dupa Essex It's how the left gains ground-they do it thru the legislative process by organizing what they want taught. That really should be left to educational experts.
@@kimlibera663 That's the Right doing that, Kim --- pushing anti-science Biblical "education" agendas, Creationism, library defunding and censorship. They're the force trying to dumb down America so they can take over.
There seems to be a disconnect between your wish for more science and your irrational political beliefs. Not meaning to make a No True Scotsman fallacy, but I find it difficult to see how anyone who values a scientific, evidence-based approach can fall for such obvious tribalism.
God almighty said ( Have not those who disbelieve known that the heavens and the earth were joined together as one united piece , then we parted them ? and we have made from water every living thing . will they not then believe ? ) [ prophets : 30 ] .
and said ( And the heaven We constructed with strength, and indeed, We are its expander).[ chapter 51: Verse 47 ]
Those verses from holy Quran before 1440 years told about( The Big Bang Theory ) that we are studying it recently discovered .
God almighty who created all the world he is only one God and he sent prophets and massengers Like Adam Ibrahim Moses Jesus Muhammad etc and revealed to them books like a book instructions of human bieng illustrates every thing we need to know .. Quran is the only book preserved from God from the past until now unlike another books hasn't been preserved .. so who wants to know truth of life he should read Quran to find the truth .
Many muslims are not following instructions of God well like isis or saudia arabia king for example, so do not judge Islam by behave of muslims .. unfortunately also media highlights the bad people in Islam so a wrong picture has been made about Islam .. Islam in arabic means ( submission to God ) .
The Quran also tells us that, at night, the Sun hides in its resting place. If you want to learn how things work, read a science textbook.
You're right that there are many negative stereotypes of Muslims. That kind of bigotry is shameful.
You were trying to explain this to people that think the sun is a lamp just above the clouds and the moon emits cold light, good luck.
I have waited my whole life to find this video. I now feel happy with an understanding of the universe that I didn’t have before. Thank you so much for simplifying this complex topic for me
Double dose of Don in one week!!! I love your content and have a great appreciation for the work you and ALL of your colleagues do in the world of Physics!
HAHA, yes!. "(clears throat) giant sphere..."
Flatards triggered!
that was more difficult for him than it should have been. HE IS A FLAT EARTHER :O
Spherical cow
loooool
Yeah, what a snake oil salesman! :-)
Awww I was touched by what you said at the end. I hope we all get to know the truth of reality & the theory of everything!
You don’t know how long I’ve been waiting for you and Matt O’Dowd to collab on PBS Spacetime
I too was glad that happened, having watched both folks in UA-cam.
As usual, Cosmology blows my mind once again...Thanks, Dr.Don!
"Well nobody was there at the time, so we can't possibly know anything"
If someone told me that I would ask them, if your house got robbed and nobody was there at the time, but there *was* any kind of DNA to trace back to the culprit, would you dismiss it because simply nobody was there at the time? 0:37
Yeah I'm afraid people claiming this are never going to learn anything.
So with that logic, there were no dinosaurs, right? Even though we found their fossils.
@@youuuuuuuuuuutube Exactly.... I don't understand some people sometimes...smh🤦♂️
@Johnny Mnemonic Well, see, you are kind of committing a false analogy fallacy because we aren't talking about DNA when we talk about the big bang; We are talking about electromagnetic radiation from the CMB.
@Johnny Mnemonic It kind of seems like it's not your thing though...
10/10 for the shirt choice
Dr. Don Lincoln is simply the best explainer of cosmology out there. Always 100%
Just finished The Theory of Everything. Amazing series of lectures! Pleasantly technical without getting overloaded in calculations.
Q: "What really happened at the Big Bang?"
A: "I don't remember, I was very young back then."
TOO FUNNY. I was born shortly after the big bang.
Keith Richards remembers
Holy cow, did we have a big bang? Sorry I missed it, must have been sleeping.
""I don't know, I was really drunk at the time"
“Big Bang is physics and physics is everything.” So well said!
Curious how is physics everything? How can physics be agent causation?
@Andrew Ongais Until new physics and math is created/found to develop these theories beyond speculation, we won't know. I mean I would like us to not have to stay beholden to c, so we can explore the universe at a more manageable rate. We just need better theories and better science to push us forward.
@Andrew Ongais it goes even deeper than physics, science cannot explain the simple, why do you chose to write on this forum? You intention cannot be broken down into chemical impulses of the brain. You have chosen to act and science cannot explain why.
Xmanx720 galaxy Same harem Logic that a buck uses in a field of does! Just for , let’s bucks just fighter out. Hahahaha
Just entertaining OURSELVES!
All $marta$$e$...
@@derdagian1 What!?
This is so well done. Covering misconceptions in a way that is approachable.
Great explanation, Don. Thanks! 50 years reading/pondering this stuff, outdone in 11 minutes! Major... 😁
I liked the subtle difference you revealed about what big bang theory is and what it is perceived as.
Keep making such videos Dr Don.
Would that small concentration be smaller than the planck constant?
Love the nod to the flat earthers 👍👏
I would consider it more "Throwing Shade" than a "nod".
A nod implies support rather than derision.
What really happened at the Big Bang? NOTHING !
Because nothing can NOT create everything !
An explosion will never create anything ! Use your brain for 30 seconds before going back to sleep and believe these pseudo-scientists and their lunacy.
THIS IS BULLSHIT FOR GULLIBLE SHEEP...
JUST THINK !!!
Around these parts a nod would be likened more to a tip of the hat on the way past.. hi>bye
I agree because Earth is observably, provably and test-ably Flat. Even Neil deGrass Tyson said you cannot see the curvature of Earth from 120,000 feet up.
They are still a thing? Thought they all already fell of the edge.
Dr Lincoln has a fantastic way of explaining things. Thank you.
Dear Dr. Lincoln, Please post a video explaining about the Tachyons.
FINALLY! This is the first clear explanation of the Big Bang. I never understood how can be an infinite universe emerge from a single infinite dense spot called singularity. The answer is: it wasn't the case, just our current theory (Einstein's theory) can not describe it.
Thank YOU very much.
You are a very good teacher, sir.
God almighty said ( Have not those who disbelieve known that the heavens and the earth were joined together as one united piece , then we parted them ? and we have made from water every living thing . will they not then believe ? ) [ prophets : 30 ] .
and said ( And the heaven We constructed with strength, and indeed, We are its expander).[ chapter 51: Verse 47 ]
Those verses from holy Quran before 1440 years told about( The Big Bang Theory ) that we are studying it recently discovered .
God almighty who created all the world he is only one God and he sent prophets and massengers Like Adam Ibrahim Moses Jesus Muhammad etc and revealed to them books like a book instructions of human bieng illustrates every thing we need to know .. Quran is the only book preserved from God from the past until now unlike another books hasn't been preserved .. so who wants to know truth of life he should read Quran to find the truth .
Many muslims are not following instructions of God well like isis or saudia arabia king for example, so do not judge Islam by behave of muslims .. unfortunately also media highlights the bad people in Islam so a wrong picture has been made about Islam .. Islam in arabic means ( submission to God ) .
szarvasmarha My excitement exactly. I didn’t think the universe was ever a singularity or infinitely dense. And I never thought there was meaning in the concept of T=0. But here it was explained for me that the “observable universe” was the size of a “proton” but possibly existing within an unobservable and possibly infinite universe. And the Big Bang is what happened after inflation ended at around T=10^-32 secs. I’m giddy after this clarification.
@@patrickdowns6916it still doesn't solve anything
How he keeps shrugging... "Sorry to blow your mind... again."
Priceless!
Clearing throat when obviously a giant sphere thank you I love you for that.
underappreciated comment.
Now, that's what I call a great explanation!
@Henrik Wallin well unfortunately there actually are predictions made based on past theories and real data but you just can't accept that
@Henrik Wallin Are you an astrophysicist or a cosmologist ? NO ? Thought so. I wonder why you think you know more about their fields than them. There is this Dunning-Krueger effect if you ever heard about it, the point is, the less you know the more confident you are in that you know everything. Such a sad cognitive mistake, I see ppl doing it all the time...
DR. Lincoln, thank you for clarifying for me what the Big Bang really is.Love your talks.
Don Lincoln is the best physics lecturer ever ! Thankyou for this.
But, he hasn't said anything that makes logical sense.
Kathy, everything he says makes sense. Perfect sense.
"What is the universe expanding into?"
What is the world of Warcraft expanding into when the creators release new content?
The honest answer is nobody knows.
computer server memory
The universe is expanding into other bits of the universe. You can do that if the universe doesn't have an edge.
@@SamGarcia No not memory, well yes and no, it is caching in sever memory(RAM doesn't store any permanent data whenever they reboot any given server for whatever reason, the memory gets wipes out, the game is expanding within a HDD or SSD.
HDDs or SSDs =p
Thanks for that. I wasn't sure what the difference between expansion and inflation was until now - I'd thought they were pretty much synonymous with each other (as a matter of fact/event, as opposed to being just words describing a similar concept). I really enjoy your talks, so please continue making physics understandable - at least at this level. I wouldn't dream of saying I understand it academically LOL. Cheers!
Really diggin' these presentations by Dr. Lincoln, going through most of them, I love that there's no music as well, a proper lecturer and makes it all easy to understand.
Thank you for your channel. I watch this and PBS Spacetime religiously
You should really watch them scientifically.
@@michaelsommers2356 Not sure if you're joking or...? If you're serious about your comment, that's disappointing.
@@Cabolt44 It's a joke, but a serious joke. Far too many people approach science with a religious bias. I know that's not how the OP used the word, hence the joking part.
Why limit yourself to just watching on Sundays? 😉
Excelente explicação 👏🏻👏🏻👏🏻🎓👨🏻🎓👩🏻🎓
New sub. I heard about this channel from the colab with PBS SpaceTime. Your content seems easier to follow for us normal unedjumacated folks. Keep it up
Neither of you can learn any content from this video. It's to unedjumacated.
Thanks so much for posting this. It certainly clarified some of my misconceptions about the big bang.
Don't question the boom or you will be labeled flat earther haha new insult for those that question the popular myth
Neah, he only gave you more misconceptions. Instead take some lessons in using logic. We will then call you Mr. Spock.
The more I learn about the big bang the less I know about the big bang!
Time is quantized, too. The Plank time unit is 10^(-43) seconds and prof.Lincoln says we can't know nothing betwee t = 0 and t = 10^(-43)s. A quantum gravity theory could help, but it doesn't exist yet
Sir, do you know about Vedic Rashmi Theory?
Wouldn’t it be more correct to say that the Big Bang is the expansion of spacetime? And as you go back, wouldn’t the increase in energy density cause time to dilate to the point where there never was a beginning? 🤯
Come here to ask this - kind of. At the speed of light and/or beyond, would the time component related to 'Earth seconds' be incredibly dilated? Trying to get my head around this in that at the speed of light, the universe would only be a few hours old from the light photon's perspective. 'Big Bang' was possibly only 'this morning'. Our cold energy that has dropped out of the speed of light and cooled to form matter is basically frozen 'in time' from the photon's perspective.
This is way above my pay grade but a fascinating topic to learn about from reliable sources.
You actually just described a black hole! Indeed, a black hole singularity and the Big Bang "singularity" are the exact same idea, for the most part. From our reference frame far away from the super dense region (big bang or black hole), we never actually see the total collapse of objects. So, if we were watching the big bang in reverse from super far away, we would never see everything collapse that far (if that's what actually happened).
Silo _fx From light’s frame of reference it experiences zero time.
ANGRYpooCHUCKER Not the same thing. Black holes don’t expand and all the space of our universe lies within the space of the Big Bang so one can’t observe the Big Bang from the outside.
@@karagi101 That's one interpretation of the big bang, sure. But Stephen Hawking formulated his idea of the big bang singularity by noticing that it behaves awfully similar to a black hole. If you take a bunch of stuff (even the entire universe) and compress it down, you end up with a singularity (or something like it as scientists don't actually take mathematical singularities to mean anything physically). Also, according to some popular big bang models, the universe may in fact be infinite and all of the "stuff" that came from the big bang was just that: stuff. There was still space outside of that region. ALSO ALSO, even if that's not the case, there's nothing stopping us from assuming a reference frame outside of the big bang even if it does represent the entire universe. IF we do assume that reference frame, as Hawking did, then watching the big bang in reverse is identical to watching a black hole form.
Omfg, the existential horror of trying to grasp the nature of the universe pales in comparison to the nightmare that is looking at a yt comments section.
They are very efficient at dissipating useful energy and increasing the overall entropy of the universe ;)
Sir, can you please make a video on "What is universe expanding into"
6:02
"Faster then light" is not a helpful piece of information, if you take two far enough points in a universe with any expansion rate the distance between them will grow "faster then light". Tell me the rate of doubling instead.
@eliya sne I noticed as well
This was literally faster than light. Light cannot travel half the diameter of a fruit in 10^-32 seconds.
@@albirtarsha5370
If i look at two sufficiently close points in the universe, even in the time of inflation, the distance between them could grow slower then the speed of light.
In addition, if i look at two sufficiently far away points in the universe today, the distance between them could grow faster then the speed of light.
Basically, my point is that saying that the universe grow at a superluminal speed doesn't tell you anything about the intensity of the expansion.
@@eliyasne9695 True but that is not the case here. The distance (and time) is not arbitrary but is specified. The rate of expansion during inflationary period was very different from the current expansion. That is part of why it is so unique. During the inflationary period the expansion was so rapid that the tiny quantum fluctuations were blown up to a large scale. This happened because it was so fast. It was faster than the speed of information.
Keep in mind that no one knows the initial velocities. So you cannot really calculate acceleration.
Love your videos. I do not have a scientific background. I only got through high school physics 40 years ago, but I enjoy expanding my knowledge of the world in which I live. Question: The inflation idea sounds wild! But, knowing how powerful it was, why did it last for only the briefest period of time? It seems like something this powerful would be difficult to stop.
Dr Alan guth from MIT proposed the inflation theory. In the 1980's . He stated, ( I am paraphrasing. ) the expansion was do to inflation where the forces .Weak and strong were moving faster than lightspeed. He than went to say the reason that inflation only lasted for a short time was do part of light coming into existence. So the reason why inflation didn't break the laws of physics.was light was not in existence. And once light came into existence it put the brakes on inflation.
Could the geometry be a flat embedded torus like you imaged here? Corrugations or wave functions would help correct curved distances of time and space.
Thank you for this cogent explanation. I have heard so many scientists use the term singularity and infinitely small or infinitely dense to describe the early universe, or black holes. Maybe they are just sloppy in their terminology. It always gave me the impression that they didnt know what they were talking about, or were treating the public like children.
I'm constantly staggered by the fact that we know so little.
"Well there's always something we don't know" - The Tenth Doctor. That's a good thing, considering it helps drive our curiosity.
then why do you believe then when they say they are certain about the big bang happening?
No kidding can you believe there are people who still believe we are on a ball. If that was true everyone in the souther hemisphere would be falling into space. Lol
@ them being wrong doesn't make you right.
@Emmanuel Araujo who says what?
@ fermilba , please don't waste your time answering to idiots dismissing the big bang
Keep up the good work
After the number line explanation, every time you say "the universe" I feel like you should be saying "the visible universe"
In the thumbnail for the vid, I thought he was holding a cup of noodles
Strings ARE kind of noodles packed with (sub)nuclear energy.
Your presentations are the best that i have seen and heard on (any) subject on the net. THANK YOU
Wearing The Big Bang Theory shirt while speaking about the big bang.
Oh, I see what you did there, Doctor.
1:20 "The reality is much stranger than that" - Even stranger, it was a program loading into computer memory.
HAHA! From an oldtimer computer technician (mainframes - troubleshooting at component level) - reality is infinitely stranger than loading programs into memory. Trust me.
is that your idea? or are you just repeating something you heard.
@Rossco Galloway -- No, no, no, it is my idea, no one has ever thought about that before, never. Right. Go away.
@@vadinhopsc component level trouble shooting, wow, thought I was the last surviving tech who remembers that. Change the board.
@@robertsparkman8516 There are some computer dinosaurs still around.... HEHEHE. My first course was on Univac 1050. Germanium transistors. 32 k Core memory. 222 kHz clock. Mind you. Then other models, smaller and large scale.... Sigh! I was happy, and I knew that. . Are you also nostalgic of that era? I still work on IT, designing networks, data centers, and so on. Regards.
Wow. Amazing video. If 10 years ago, my teachers taught me physics like this, I would never have dropped science and pursued law.
"Even when it's... *clears throat* not flat"
Oooh he's coming for y'all flat Earthers.
Not knowing exactly how the universe started is so much more interesting than the creation myths.
Totally agree. Proponents of the myths, often point at some aspect that science can't explain and then insert a god there, as if that makes more sense.
every theory on the origin of the universe counts as a creation myth, and I think it is rewarding to be curious on the origin. i realize you're prodding dogmatism, but it would be more interesting to know or to come up with theories than to be satisfied with a lack of knowledge.
Oh, I don't think so. Your "creation myth" starts out by saying, "In the beginning...." So Mike, how do you have a beginning? What starts a beginning? Wouldn't there have to be a prime cause that is ABOVE a beginning? How did YOU begin? What was the prime cause that caused you to begin? Wouldn't that be something above and before your beginning?
Thanks for dumbing that down for me. The most educational thing I have watched for a while.
Maybe the universe isn't expanding but we are shrinking. Haha
😱
Better idea than the Big Bang hahaha
I always appreciate free thinkers, and anyone that doesn’t dogmatically follow the group think of pop culture.
That being said, I paused the video and read those comments. And they are some of the dumbest responses I’ve seen.
As a general rule, one should do some basic research on a topic before having opinions. That goes for science or even politics. Never just repeat what people told you. Look into it.
They are lacking knowledge required to understand the Big Bang theory. Unfortunately, it is the same knowledge they would need to properly assess their ignorance in the subject. The Dunning-Kruger effect in a nutshell ;)
It takes a smart person to make something complicated sound simple!
The most important event that occurred at the big bang is that I became a possibility. I know this to be true.
Very true ! in a sense we all "were there" at the moment of the " Big Bang" but got "assembled " in our present form 13.8 billion years later . Wonderful !
Clearly if there was an event of reason, then you were already a possibility.
@Real Donald Trump Just go and nuke Iran already.
God almighty said ( O assembly of jinn and mankind ! If you are able to pass through the regions of the heavens and the earth, then pass through; you cannot pass through but with authority ). [ chapter 55 : verse 33 ]
One of a lot of verses from holy Quran emphasize the fact that there is one God who created the all world .. Our lord told us by his words in Quran revealed to his massenger before 1440 years that humans will go to sky .. If you want to know truth of life read Quran you will find the truth .
Quran is a book of signs not science but has a lot of science in it .. like big bang , couples of plants , how the life begining , creation of humans , expantion of the heaven and a lot of signs in different fields in science no any errors or contradictions ..
Before judging you have to study and read .. no body can just say oh you are wrong based on wrong informations from media or ignorance and misunderstanding , God gave us brain, eyes, heart and ears so as to use them searching for the truth otherwise don't blame only your self in day of judgment day of acounts .
5:09 i saw what you did here 🤣🤣🤣
Just curious, what did happen to Dr. Pemberton & Dr. Campbell?
Watching this guys hands through the video is driving me crazy!
Yeah, me too ! I had to put my hand over him to be able to focus 😁. I'm eye sensitive (don't know if this is the right translation 🤷) and the joined, arrowing fingers LITERALLY HURT my eyes 😕
But still, thanks to the Doc 🤯
Never trust a guy who wears a shirt that says "Bazinga"
I'm not a physicist, but every time I hear someone say that the universe started as an infinitely small singularity, my eyes roll. Explaining the big bang as simply expansion from a point with an unknown size makes a lot more sense to me.
Wait I thought Chicago was the center of the universe. That's what all my relatives up north say. Go Salukis
No point is special, not even Chicago.
It's beautiful to be able to relax in an alternative-facts-free zone like this and just let your mind enjoy itself.
I love your videos! You are an amazing presentator for this, its really interesting and fun to watch!
i know what happened before the BIG BANG -- two glasses of wine and some barry white on the radio.
You are Legend!
Our whole universe was in a hot dense state.......
Oh wait wrong theory 😏
_...a hot dense state..._
Hmm... Georgia? Alabama? Mississippi?
This channel is exceptional!
Can you tell me the name of the music album that you play as intro
I have a question. Was there a fundamental quantity of space and time that came into being with the big bang? If not, then where is all the additional space/time coming from? If there was an original quantity then perhaps it's thinning out as the universe expands? I am assuming that space/time has a real existence and that it is not an empty void but a product and function of the big bang itself. If this is the case then how is the universe able to add more and more space and time to the mix to prevent it from thinning into non-existence?
wait, i have a ton of questions. we have lower bounds for a bunch of things, like plank time, plank length and so on. do we have any upper bounds
Fred K. c for one!
4:52 The big bang is the expansion but not matter moving through space? Im pretty familiar with all this stuff but im totally lost there, can you clarify that?
Expansion means that the distances between two points in space grow, without "actual" movement. It's a change in what the distance means, so the metric of space, not a velocity. Inflation was, presumably, a period of extreme expansion that is needed to explain some properties we observe in the universe, like why its so evenly distributed even at distances that couldn't have communicated at light speed if space had been expanding regularly. PBS spacetime have a video on that ua-cam.com/video/blSTTFS8Uco/v-deo.html
Think of a rubber duck on the surface of the river, with another duck held by someone near a river bank. The duck on the surface is not moving compared to the water, but it is moving compared to the stationary duck. That's because the water is moving.
The expansion of space is similar.
Hi Dr. Lincoln - could you please make a video about the neutron?
I'd like to know why it's so stable in the nucleus and
why a free neutron outside the nucleus decays with a half life of about 10 minutes?
Can you produce a naked singularity at your lab?
even if for a brief moment
You didn’t mention Roger Penrose CCC theory, wich to me seems very interesting.
DR LINCOLN IM COMING TO SATURDAY MORNING PHYSICS FOR THE WINTER SESSION THIS WEEK AND I CANT WAIT TO MEET YOU YOURE AN ICON
SMP is awesome. I very much hope you enjoy it.
Very good explanation professor. Congratulations. Difficult topic to digest completely. 👏👏👏👏👏👏👏👏👏👏👏
How far down in size does general relativity work, at planck length or other?
This is the best video from you. Thanks for the video.
Hello sir, i really want to know an answer.
I was studying Quantum field theory some days ago and i Google some stuffs about it and i read from BILL BRAY(physicist /Director at US Department) in QUORA that if there is fire by rubbing two woods, then it doesn't mean that fire was inside the woods. So how can particle physicist say proton is made up of Quarks just by colliding two quarks. And this thought made by ady worse. Please clarify that..
When we analyze the fire properly, look at the color, the smoke, the temperature, we can find out what it was that burned.
I don't get time such as "10^-23 seconds". Referring to a second now, or then, which would have been, hmm, slower, because of high density? Was the big bang then, (even at the beginning) just a slow fountain?