Brian Greene Hosts: Reality Since Einstein
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- Опубликовано: 1 май 2024
- In celebration of the 100th anniversary of Einstein's general theory of relativity, leaders from multiple fields of physics discuss its essential insights, its lingering questions, the latest work it has sparked, and the allied fields of research that have resulted.
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Original Program Date: 05/30/2015
Host: Brian Greene
PARTICIPANTS: Gabriela González, Samir Mathur, Andrew Strominger, Cumrun Vafa, Steven Weinberg
Introduction with Brian Greene 00:00
Participant Introductions 04:25
What aspect of physics is so important that you would tattoo it on your body? 08:05
Steven Weinberg takes us from Newton to Einstein. 12:05
What was the observational support for Einstein theories? 19:20
Can Newtons ideas be extracted from Einstein's? 23:40
What did Einstein think about the Big Bang? 30:58
What did Hubble's observations discover? 33:39
What is the biggest unsolved problem in cosmology? 38:03
What is the history of Black Holes? 40:31
Einstein's thoughts on singularity. 47:33
What is a gravitational wave? 50:49
What does a gravitational wave sound like? 57:52
Combining General relativity and Quantum mechanics. 01:00:28
Cumrun Vafa on String theory. 01:10:50
Samir Mathur explains information loss at a black hole. 01:17:45
Black Holes to Wormholes. 01:28:45
Is the fabric of space time a physical thing? 01:32:24
What is the one question you would want answered in your lifetime? 01:36:37 
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daffy more pebkac
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If what I see the world before and I knew that the statue all around the world they are all the just the bad example of people in the past , people ...kids in this present time should used the Brian and analysis with carefully not too hurt anyone else except yourself... the world is so cruel , bad ...selfish ...and very cold ...and it always be like that forever. Do you think these retarded kids need to have the better world? Or something better than what they are facing with? Do they screaming and asking directly to the world one by one ? Hell No, But they would agree with me in something if I saying out ...for sure... ask for more painful for your torturing ideas ... yes is what I would want ... make me more ....until turn me to be not weak and useless to be not human no more ... there is no God left in me ... that what I am waiting for , am I surprised you guy or u didn't expect what will come out from me ...
Keep all the goodness with your people ok ... don't mixed with these kids like me ... if I don't go hardest as you I won't get the best from you ... I won't know how the world greasiest as well ... because there are so many bullshits in this universe... sorry that I used this way to see the world , people have just only one life .... not more than that ...I want the other human should know this very well . Not to say ... you can start to have to new life ... pause ...this ... because half of these people never gonna make it.
Do you know why I am so confident ...about life that I am inside now ? Because I see that loop....I can guess from what I am now ... I am sure that it has to be like that .... like a unknown powder that you love to used with us.
I know u love to see lot of the depress people who in the crazy hospital ...right ? What a beautiful images ....isn't it ?
I don't mind admitting I have a huge man-crush on Brian Greene. He is such an incredible educator. He makes complex and seemingly boring subjects feel magical, joyful and funny.
Are you a guy? That's so gay
I love brian greene, he is the one who is inspiring me to go int o physics. I cant get enough of everything he does
i think he wanted to be a magician, he just can't keep those hands still, someone give him a deck of cards please.
@@HarryNicNicholas jews and italians are very closely related genetically. Could be the reason hehe
JeuϟPater whaaatt?
Yes it's true. Simply amazing.
Gayyyyy
It’s amazing that a mere 4 years later we have proof of gravitational waves and a picture of a black hole 😍 what’s next???
Gabriela Cambero - Don't think you're aware that GAS BONDING has totally DEBUNKED Gravity.
@@rayagoldendropofsun397 Gravitational waves were observed less then 2 months later.
@@IDraganM -
Gravity started with Newton's apple downward falling motion, which is wrong.
Truth of downward falling motion happens when active rising gases in free flowing motion bonds together making solids, trapping it's molecules motion within.
Example: Atmospheric oxygen and hydrogen gas molecules bonds together making water, which is a state of solid motionless mass with its molecules trapped within, because of this, it's free flowing motion is lost, causing a downward falling motion known as RAINDROPS !
Discovery of dark matter or dark energy maybe.
@@vitthalpatil1974 I think you meant worm hole, man has already found a warm hole. =)
Einstein was figuring all this out in his mind while people were still traveling on horses, discovering & understanding time dialation & length contraction by doing thought experiments, at a time when spaceflight was but a dream. Genius doesn't seem to do him justice, & it makes Newton & all those others even more astonishing when you consider how long ago they were figuring out all the different laws of the universe, when man's knowledge & scientific understanding was so limited, extraordinary mind's that one can but appreciate, marvel & envy. Bravo.
There was steam power and railroads.
According to wiki the Wright Brothers were in flight in 1903.
Einstein's was smart, but his Space Bending theory is impossible.
Newton's Gravity do not enable motion !
Mathematical concepts without physical evidence is not physics !
@@rayagoldendropofsun397 Then what is the true mathematically consistent description of gravity?
@@akosseres There's none.
All Newton's equations of motion fits perfectly with ENERGY.
If there's one single motion that's enabled by Gravity here on planet Earth, please let me know !
@@rayagoldendropofsun397 If you throw an object here on Earth in a vacuum then the trajectory is going to be a parabola... That's because of gravity.
Also, the precise calculations needed to launch rockets and satellites into orbit would not be possible without mathematically describing gravity.
Also general relativity perfectly predicts the motion of planets inside the solar system.
Up until 3 years ago I was familiar with Brian Green. Because of utube and Dr Tyson I became aware of two more. I am now familiar with six leading scientists that I can put into my lexicon of science . I am a 72 year old disabled Vet who is thoroughly enjoying the internet and the questions science is raising. Keep it coming guys...
Leon Clark Thats incredible!
I love this comment. 🥰 so glad to see the beauty of the internet and exchange of information have a positive effect on someone's life. It's made an impact on me too.
this channel rocks
+realcygnus .YES it is easy to define ''Human''in behavioral ways (which correlate
to biological and chemical((Genetic))forms.Humans ,in large
populations,are always born with five fingered hands,and opposable
thumbs..period...IF it's possible,to find a average
sized''human''population,without ever having children born with hands or
fingers,THEN the scientists would also find that same human population with
different,or developing differences in their bio chemistry,mental-brain
organ developments,and,most obviously..BEHAVIOUR...
+realcygnus
Actually reality has weathered the rise and fall of Einstein pretty well. When his theories are forgotten reality will still be around.
Heisenberg-SchrodingerEmc2 right......some ppl....I guess he thinks his GPS works cuz Allah made it so or something.
+LampDoesVideogame Newton did not have a theory of gravity. Newton observed that the same force that made things fall to the ground also kept celestial bodies moving in their orbits. He devised laws as to what motions the effects of gravity would produce but Newton never considered what the force of gravity actually is. Einstein's General Relativity is a theory of gravity because it proposes that gravity is caused by mass distorting spacetime and objects traveling through the geometry of spacetime are affected by the shape of spacetime itself.
+realcygnus That's because physics _rule_. ;)
Brian Greene is the best moderator of science discussions by an inflationary order of magnitude!😍
Dr. Brian Greene is one of the best! Thanks for all your hard work, Dr. Greene.
i think i'm the only person here who likes these subjects too much without understanding anything at all.
One of the best science speakers and an amazing personality, Brian Greene. So much respect to him. He’s one of those people who attract and make you view him as a role model even though I’m not in this “role model” concept overall. Like the Higgs boson that brings pieces together and makes mass matter.
Wish I d meet him once in my life, Dr.Brian Greene
I never realized this but Brian Greene is an excellent host! Very well handled when others tried to talk over others. Great talk!
Remarkably smooth and well organized. All the media was spot on for the point being made at that moment. This isn’t edited but just recorded as it happened. They must have had some planning meetings, dry run throughs or something. I love watching any session where Brian is the host, as opposed to ***** who constantly interrupts.
2 months after this video was published gravitational waves were detected. I love science.
@UR Just Wrong ok so who is correct? Does either side have incontrovertible proof?
21 people currently do not like physics. This was great, but most all of them are on this awesome channel. It's a damn shame this channels videos don't get millions, and even billions of views.
some kind of knowledge you get from al beleave me i got a bit of all but all is allmost mine i love you all thanx - soon we all aprouch each other keep an eye on it you little dude.
What a fascinating discussion! I wish more people on this planet would listen to brilliant scientists discuss the natural world. As an aside, Brian Greene is an excellent host of these scientific forums. His ability to rephrase an expert's statements into more simple, less technical language is masterful. And finally, as a professor of psychology for 43 years, I have realized a passion for physics during the past 10 years. I just wish I could live longer to study this field in more depth. P.S. As we all know, gravitational waves have now been detected. How exciting is that!
After Carl Sagan, I think Brian is the second host who can talk to these scientists in this manner.
👋👋👋👋👍👍
i do not understand this complicated intellectual discussions but truly enjoying all of these incredible scientists talk
This was the best panel of WSF, everyone so down to earth and so lovely personalities 🌎
I have never watched almost 2hrs clip on youtube sacrificing my night sleep...and I am taking Bachelor of Doctor of Medicine like what am I doing here...but I can say Physics has found its Spokesmen...The ones I can listen to....bravo Brian et al
Much appreciation from Tanzania
I wish this group will sit together once more and talk about the same stuff , knowing that we now actually have the first pictures and scientific evidance of black holes and the ripple of time and space 😊
I could listen to Steven Weinberg all day. What an amazing intellect. I would love to take a class from him and can’t believe he is still teaching. I would love to know what he meant when he said that he doesn’t look at the pictures, they are misleading (or words that I interpret that way).
thank you science guys. These RUclips videos really get people thinking and you never know where the next great ideas will come from. Hopefully programs like this will help to seek out the next genius to fill in some more of the picture. I'd love to be a fly on the wall to see what the next hundred years will bring
Fascinating indeed!!! One of the few worthwhile videos in RUclips that I enjoyed!!!!
What an incredible line-up of brilliance!
Man what a panel of guests.
It gives me hope that Einstein and newton's legacy have not fizzled out but on the contrary, they are flourishing
Hey guys! You have to invite over Gabriela Gonzalez again! Great speaker, explains beautiful, and was really enthusiastic at her time.
Her prediction about when the first gravitational wave would be detected was on point.
Einstein predicted the black holes but not the gravitational waves.
In this presentation, Brian Greene serves as the perfect moderator because he offers a style that contains both the academic scholar and the "close friend." He is highly credible, and he is always fully aware of his audience's needs. The panel consists of today's geniuses in their fields, and they all performed spectacularly. The content included a huge amount of important material. The visual technology and platform for this presentation is superior and it was sharply executed. This is rather lengthy as presentations go. However, this one holds your attention throughout. So, sit in a comfortable chair, open a good bottle of wine, and enjoy this presentation.
Prof Weinberg is such an eloquent speaker. Prof. Samir isn't far behind.
She was right about receiving that signal using Ligo. Less than 5 years.
Was thinking the same
Wow incredible video and guests. Thanks you!
55:55 I come from the close future and we have finally detected the gravitational waves:):) Just as Einstein predicted
This is just what the worlds needs a group of people all over the planet talking about science in a calm manner.
out of all the world science festival videos I've watched Brian Green is the best presenter by far. I wish the others were as organised and knowledgeable about the subject as him. The concept of getting someone in to host who doesn't know anything about physics is not a good idea in reality it just comes across as unprofessional and can confuse the listener.
As bidarwi from bbc Nobel minds
He’s very articulate and easy to follow, even on complicated subjects. I always enjoy listening to him.
Just in between 2015 when this was recorded and now 2019, the gravitation waves made due to two colliding black holes were detected and therefore proved and a photo of a black holes were taken.
Such a wonderful time to be alive.
Physics is so gorgeous and so exciting.
the matterialistics can not make it with out the electromagnetic ones they need each aprouch see it soon.
timestamps is a big deal for any long educational video. much appreciated.
steven when he talks and closes his eyes BEST PARTS
next year she will come back! :)
Outstanding presentation!
Very informative and was gratifying to hear such luminaries on the complex topics.Thsnks to the organisation.The last comments left me puzzled yet.
This made my whole damn week !!! Thank you.
I cannot thank you guys enough for your uploads and channel. You have been a source of inspiration and knowledge for the open mind and to those who want to see the world differently, more beautifull.
Thank you from South-Africa. One day I wish to sit in the audience 😉
Wonderful discussions. This group of scientists were particularly brilliant and stimulating.
Great set of panelists and the new "two track" approach is a great improvement
Thank you for a challenging stunning video. What an extraordinary universe we live in ...
These are my role models and people I deeply respect for getting to the root of it all.
you are found in no place; existing but not at same time were you can be in all places at same time were reality is not real - come on.
@@espaciohexadimencionalsern3668 tf?
@@lostaccount3374 ¡?
@@espaciohexadimencionalsern3668 don’t go through life dumb
Good to see Steven Weinberg doing so well.
I joined this year's WSFB, and with kind of hindsight when I watch this clip again, I see Brian Greene having appeared to be skeptical with the attempt to detecting gravitational waves. Interesting!
Brian Greene is one of the most eloquent speakers I've ever heard on the subject of astrophysics. And his wit is an added bonus.
Well, Lucky Gabriela, did not have to wait so long in the end for results from LIGO :-)
I want Brian to be my general physics professor in uni!
I am definitely awed by science and would like to learn more. The presentations from the men’s festival are impressive. I look forward to presentations from the women’s science festival, which I assume is upcoming. For some reason, women’s explanations of complex topics are generally easier for me to grasp.
Brian Greene is not only very good at breaking down and explaining complex topics but at the same time very entertaining at it
I live only a few miles away from the Livingston La LIGO. It's a pretty dang interesting place if I say so myself. 😊
Fantastic discussion. Brilliant minds all over.
Thank you for sharing! I enjoyed this conversation!
Great talk. I would really enjoy a discussion about the fundamentals in mathemathics, physics and philosophy -- the difficult problems at the point of the arrowhead: Inherent indeterminacy in axiomatic systems (leads to measurement problems in physics). Experimental data is pointing to an emergent reality. I would like to listen to new ideas about the metaphysical implications of quantum mechanics. I would even embrace very speculative ones, because strange -- coherently strange -- ideas should be considered at this point.
Epistemology plays a very important role in how we define axiomatic systems conceptually (often underestimated). We need new ways of asking difficult questions, because the purely mathemathical picture of the universe seems to break down to the language of mathemathics itself as we probe deeper (This does not mean that reality is mathematics. It means that reality is idealistic, and we do not know how to deal with that -- because it implies that reality has some kind of purpose).
I would like to listen to people who do not confuse the concept 'absence of anything' with the number zero. The concept 'absence of anything' is nonsensical when it is applied to physical systems -- and even in ordinary language. This confusion seems to be widespread. It leads to theoretical weirdness (Infinitely expanding 'nothing' described as 'something' etc.).
I would also like to listen to creative ideas about how the observer fits into this picture. The C-word and quantum mechanics mentioned in the same sentence is not necessarily just semantics or quantum quackery. The act of mesurement: interaction between probabilistic fields, seems to have some fundamental significance (interaction presupposes an observer ... a point of determinacy). This means that reality is at least self-referential at the quantum level of reality (I am one of those 'crackpots' who still consider the possibility of teleological effects). I want to know what is going on there, because it seems to me that I am either crazy or that there is something everybody else knows that I just do not understand.
That's just amazing. I liked how Samir talks about the start of the universe was like a marble @35:00
Been so excited about this! And I'm actually privileged enough to study the physics of relativity at uni, this is so inspirational.
did you make it yet
You say your "privileged" says so much about you.
In my eyes you and the sciantists above are the South Pole explorers of our time.
@@thomasbramwell9592 I'm modest about my ability and take pride I had the opportunity to study physics. I'm not at all privileged in my upbringing if that's what you are implying. I am working class.
Are you massively generalising 'scientists' or 'physicists' in your eyes? The scientists above are the scientific communicators of our time. They are bringing science to the public interest.
@@khosKarm Uni physics? Completed it mate
@@HanzOnGaming137 That’s really nice!
Really Fascinating discussion
Thank you
I am still amazed on how many predictions General Relativity is still making.
where are the subtitles??? I need to watch this and I need the subtitless :(
Brilliant. Especially the last 40 minutes were fascinating and give me something to chew on. Some crazy ideas already popping into my mind, better keep them for myself. :-)
+Erik Žiak (tramstefanikova) NO! TELL ME!!!
Erik Žiak Go to physicsforums.com or other appropriate medium and discuss your ideas. Don't keep them for yourself ;)
Was this one year ago? Time certainly lost its meaning. I forgot what I was thinking then. Nobody is interested in my garbage thoughts anyway.
coppy right them i all readdy did at three times actualy four
Does anybody know where I can find more in-depth information about the theoretical temperature graph of the background radiation, which comes up at 37:33 ?
Extremely inspiring video and people, thank you.
Thanks for the math and nice visualizations. It's really enjoyable to see all this videos. Feeding knowledge and curiosity, a productive replacement for my Netflix addiction.
Brian Green is an brilliant physicist AND a amazing pedagogue...this rare breed of scientists, deserves a Nobel price in my book.
Just watching this today and hearing them talk about trying to detect gravitational waves from colliding neutron stars within 5 years and poof 2 years it worked awsome stuff!
Brian makes these talks great with his interventions to clarify matters.
Thank you Samir. I was wondering why the entangled particles that fall into the black hole have negative energy.
It wasn't _precisely_ that light will be deflected by a gravitational field - since Newton's math already showed that would happen. Einstein's calculations though, showed that the effect would be _twice as great_ which was the important difference.
Physics is the same across the whole the universe, of course the universe is going to be homogeneous!
Dark energy should not be looked upon as a mystery, it is a fact, embrace it!
Black holes are very obvious, the maths shouldn't cloud the observation!
Black holes don't have a singularity!!! Come on this is just common sense!
Oh jesus, if you accept a gravitational field you must have gravitational waves, wtf is this women on!!!!!
I enjoy going back to these previous lectures knowing how much has been proven and how they arrived at the results. These are timeless by providing so much theory and applied comprehension.
Lol. Applied comprehension? 🤣🤣🤣
@@holdendavid9025 Don’t hurt yourself on my account 🤪😜
5:06 .. "Prease" - I love Brian Greene, but I had to do it lmao
next year she will come back! :)
Einsteins mistake was him thinking that he had made a mistake - Steven Weinberg
Steven Weinberg is a moron. Einstein was a quack. The whole notion of space-time is utter bullshit. Space has no physical properties, and time is just measured motion.
@@Mick0722MX You have a point, BUT do you have an alternative theory how the universe works at a macro level. Could you include equations that predict the movement of the Earth's motion around sun?
@@jamesdolan4042 Open any credible Physics book, and it will tell you pretty much anything you want to know.
@@Mick0722MX you are a vegetable.
@@hattron6704 You're an idiot.
Actually I think this is the top of science these days. It is so amazing and the GUT theory must be the most important theory ever. But the questions are can we combine these theories or will we evolve a new theory which take some evidence of both theories and evolve a kind of new theory of gravity. How to measure it would be a mountain of enormous difficult.
Wonderful thankyou for this!
Always pleasure hearing brian greene.....
I actually do have the same formulation of the Einstein field equations that they show at 19:00 tattooed on my arm :)
big mistake boddy he is based in just a color(yellow one) and space is not flat but exagonal cone shaped
It hit me when he was in an undergrad in college and bought Einsteins book and within “ a couple years he understood it.” I’m in my 40s and just now acquiring this knowledge. I’ve fretted away my youth….
Brian is a genius love to watch him he's one of the smarter person in the world.
when Brian announced 2nd guest I heard "Erwin Schrödinger", I was like whaaaaaaaaaaaa.... oh
But then you measured and he was dead?
It would be the epitome of quantum mechanics :)
How beautiful is the current time w.r.t this video. We have detected gravitational waves, we have black hole image. Way to go Science!!
In audible, scratching sounds, you can actually ride the waves, using an open vco. its Something unique when you discover the time-space heard of so many times. Doing so before you even heard about it
Dr Weinberg is a pleasure to watch and listen to.
Due to my stupidity i can not put into words the greatness of this video
Not stupidity but your insight.
59:20 "I think it s going to be in less than 5 years"... (took them 2 months! how beautiful...)
yes im sure they must have jerked off to it on the spot and then came all over the computers and report papers ohh yeah
@@samirrimas what you upset about
Great episode thanks.
It’s so wonderful that since this video was published two of the topics alluded to have been addressed successfully: we have confirmed observations of gravitational waves and we have the first image of a black hole!
a black hole with only one charge will never make it, not all that shiness is gold not every thing rounded and dark is a block hole - all sistems have holes wene crossing the bridges of each color from center to right and left - all sistems have a center, a north side and south side.
in the joint of two black holes in math wene they encounter they should create a disc that i never hear of.
Consider the Big Bang as not being the origin of our Universe but the continuation of space time from another universe where Black holes with so much density actually rip through the fabric of space. There might be as many universes as there are galaxies in our own backyard. Philosophical and science fiction stuff in itself but hey no one knows what happens inside a black hole and did Hawkins not discover that black holes eventually evaporate.
and they detected the first gravitational wave 5 months after this ! Amazing ! Science Rules !
And now, a photo of black hole is successfully taken too!
was looking for this comment
Science, alone, doesnt actually do much. Highly intelligent people 'rule', as you say.
Those bestowed with a rare level of intelligence created science.
Anyone may make theoretical knowledge. Most persons may discover practical evidence, measurements, methods, repeatable experiments, analyses, models, etc.
Physics definitely didn’t end with Einstein. Like all great thinkers before him and since, he opened far more questions than he answered
Where and when is this expansion accelerating? I hear it said that the further ack you look the faster the expansion. Then it would appear to be slowing as you come forward to the present? This I need clarification on.
@43:00 the picture of black hole ... Several years later we have a real picture of a hole
Mr greene ur way of explaing is so nice ..love from pakistan
When I was young student.... Always loved Physics, Mathematics & Architecture before I drop off-from my university for personal reasons & succeeded different way!... Great conversations. I enjoy it. One day I'll hold my favorite titles...no matter-what-it takes. Just to keep my brand...Not to make money for it.
For some reason when I read the Foundation Series Dr. Greene was my mental actor for Hari Seldon's character.
This comment board is full of people with no education in any relevant field critiquing the smartest people working on the most difficult problems in physics. If you're about to comment something negative, think just a few seconds longer about whether you have anything actually relevant to say.
Sean Cook such is the arrogance of people nowadays
Sean Cook Butthurt?
Keep stifling People's intrest in science nerd
Daniel very clever i fast forwarded just to see what you were talking about thanks
LOL. dude, that's harsh
Its crazy how many models and theories come from Einstein's theory and equations. Sheesh talk about a legacy.
I know, right?
@A Person Wrong about what, exactly? There's a number of theories he proposed, most about gravity of course. And he WAS wrong about some minutiae, actually. Quantum entanglement was one he was proved, finally, to be wrong about, and Neils Bohr proven to have it right.
@@justaguy6100 Actually Einstein discovered entanglement, so ,was he really wrong about it?
@@yanair2091 Oh he ABSOLUTELY theorized it's existence and all due credit goes to Einstein, it's more about the nature of whether that information implied by entanglement was fixed from the beginning (Einstein's position) or transferred at the moment of observation (Bohr's position). Bohr's proposition was ultimately proved to be the case. There's no slam of Einstein here this is pretty far in the weeds of quantum theory. It was, as he said, a "spooky" notion that regardless of distance, and instantaneously, entangled particles transmit this "information" to one another. He just didn't accept that was the case, as a matter of practicality and the limits of lightspeed, BUT it turns out it does happen, as spooky as it is.
@@justaguy6100 Quantum Mechanics still til this day haven't explained quantum entanglement which Einstein discovered so in that sense QM might be wrong. The John Bell's experiment are only 85% accurate in favour of QM but Einstein is right when he said that QM is incomplete.
Absolutely brilliant discussion
I had a conversation w/ Dr. Weinberg about 25 years ago on the possibilities of quantum effects being responsible for "paranormal" events. At first, he was reluctant to admit that there might be a connection. After a half an hour or so, though, he did confess that it was not beyond the realm of possibility. Now retired, he is still one of the most open minded physicists that I have met. Though, perhaps not with all of his colleagues.