+undo.kat Dude the speaker is Allan Fucking Adams He's a great physicist and specialy a great Lecturer (go and check mit 8.04 if you don't belive me) The point of the talk was Why should this matter to the public? He gave an excelent explenation on that, it was not about new details of the gravitational waves
lol if you were asked to give a ted talk, of course you're gonna rehearse. it's not freestyle rapping. and it's recorded so you'd be judged by your colleagues.
+Shwabz Amen, I actually thought it was funnier that he laughed at his own jokes and nobody else did. Especially the awkward silences that followed them.
+JMan I'd like to think that but listen carefully to silence after he makes a point. You can hear people coughing, drinking water, etc. They all Look like they already know all about gravitational waves they should have got a high school physics class in the audience.
I understand his enthusiasm, but for anyone interested in something called "What the discovery of gravitational waves means" will be greatly disappointed by this video, since it doesn't say anything about the implications (and or what follows). It's just sharing an emotion.
@@blueckaym he leaved it clear, you will be able to detect things imposible to observe by us now, planets, black holes, the age of the universe, the point of the beginning, understand gravity, probably even create sensors that can detect, lets say people lost in a forest by detecting their particular gravitational signature, detecting incoming asteroids, knowing gravitational waves exist maybe will allow us some day to know how to cancel them etc etc
"When a kid talks about marhsmallows" Crowd: WOAHHHH CLAP CLAP CLAP "When someone talks about a miracle breakthrough of proving einsteins theory." Crowd:....
seeing his passion and love for physics is so mesmerizing, if only people would value and honor such scientists the world wouldn't have been where it is right now.
you mean thesame people who believed in science more than the other [party] who cling to their godly faith about some higher being and how climate change is absurd? OK...
The two black holes that LIGO detected actually came from one star if you can believe it! One massive star rotating so fast that when it collapsed into itself the mass coalesced into two separate locations which continued to whirl around each other, until they slammed into each other causing an explosion that literally shook the entire universe. That is amazing.
+MARS TV CHANNEL Maybe. Get back to me after you study physics for 40 years, then do another 25 years of testing and experimentation. YOU COMPLETELY WORTHLESS MORON!
+ChaosmanOne BS, there would have been several more detections by now if this had been a real one, given the number of galaxies that is in the range of LICO is claimed to be in the millions. As simple as 123 buddy.
Mastikator I'm talking about both events, and they were detected - both times - in two places, and what people do not get is that the second one was also a simulation. If not, there would have been at the least several more detections by now, since they claim that this LIGO covers at least a million galaxies, see? Do the math.
In this engaging talk, researcher Allan Adams explains about the story behind the discovery of gravitation waves and what it really means. A very useful for the students of physics & Astronomy. Highly recommended.
I have had an intuitive understanding of black holes for a little while now. it is so strange, how the dimensions of the universe appear to us humans based on our physical order within the universe. they always make me think of what must exist in order for there to be something new. its so cool that people like me can be fed the basic information on such profound and detailed science and have their own understandings of it.
+Darren R maybe he WAS trolling, but it doesnt invalidate his statement. just because there are facts and truths as the result of science, it doesnt make it any less beautiful. many scientists ARE artists to be able to come up with the results that they do with the information they have.
Most science today is just fiction...it is math, not physics... physics came to a halt over 100 years ago with Einstein's nonsensical theories that have sense been proven false. Check out the Electric Universe theory, Wal Thornhill
You guys should disable comments on all of your videos. It's literally a cesspool of ignorance from people who have no experience or knowledge of the video's topic. Great video, happy to be alive for this discovery.
LP620 You have to rise above it and appreciate the fact that, at least people are free to express their ideas. Overall it's a better community than one structured around censorship.
We shouldn't blame the audiences, because most of them probably didn't know very well about physics. Go to the mit opencourseware, watch the quantum physics taught by Allan Adams, you'll find the class is full of laugh and applause. And according to my personal experience, applause isn't usually heard in classrooms.
Okay, wait wait wait... I understand that the further you look, in distance, the "earlier" you're also looking because of the speed of light... But how far would you have to look to see the beginning? Does anyone even know in which direction to look? This is making my head spin... like a blender. >
+MissyLeyneous every part of space is expanding in every direction so i think if you look in any direction you will see the beginning or rather to the point where the space/energy/matter is so dense you can't see through it
PitchBlackFox Maybe, like an expanding bubble? Where the air is everything and the outside of the bubble itself is "the beginning"? Cause then there's nothing to see after that, it just stops... That's one step removed from making sense, but it's better than before. XD
MissyLeyneous every point is expanding in every direction, think of it like a sheet of rubber with dots drawn on it, as you stretch it out all the dots grow further away from each other. its not an expanding bubble, space itself is streaching
+MissyLeyneous It doesn't neccesarily stop after you reach the end of the observable universe. It's simply impossible to observe, because at that point, the total space between us and that horizon is expanding at the speed of light.
Space is expanding like a sphere growing out in size equally from all points at the same time. So, if you reverse it then you'll ultimately converge at the beginning of its expansion no matter which direction you looked in to see the convergence.
OK. let's get something straight. He says a gravitational wave stretches us, but in truth, we are NOT stretched relative to the space around us, because that space we are in is also stretching. So no wonder we don't feel anything. That's why the LIGO measurements have to cover such a long distance. They have to measure a comparison as one section of space time is stretched and then released.
It's not the fault of audience bcz even scientists took a huge time to detect gravitational waves , so how these people can understand that in just 11 minutes speech ....
I understand what gravitational waves are, but one thing baffles me. What if there were multiple sources of gravitational waves all around us? That would mean we are bombarded by gravitational waves from all around the place. How does the stretching and expansion of the gravitational waves behave if we take that into account? If there are gravitational waves coming from the left and from the right?
Luckily, events that are large enough for us to detect are fairly rare. This means that we measure isolated collisions or mergers and can pin-point them with great accuracy in the sky. Soon we will be able to tell not only where they come from but also the wave polarization which will tell us even more about the event being measured.
Einstein, how lucky for us he was given the chance to advance civilization. What a different world we would have today without him. It took about 100 years after he predicted gravitational waves, through his general relativity, to prove they exist.
iliketrains0pwned: Gravitational waves may provide details about our 'universe' prior to singularity, but they are theoretically limited to the speed of light. Since our cosmic bubble is expanding faster than the speed of light, our species will blink out of existence in relative blindness. *enjoys coffee
*comment section analysis!!!!!!!* 2% this guy is so nerdy and smart omg queen 3% omg im mindblown 95% *WHY DIDNT THE AUDIENCE LAUGH AT ANYTHING ARE THEY DEAD??????*
So what do they mean???? Nothing but history and metaphors in this speech. "You can hear the universe speaking to us." Tell us what it means in basic principles of physics, which we all know and don't need metaphors for.
+starczarar Waves like sound and light can both be used by humans to gain information about the world around us. So what this means is that now gravitational waves may also be used to learn about events that we otherwise would have never observed. This may lead to new insights, which is the whole purpose of science :)
+starczarar It means that gravitational waves are real and since they do not interfere or get absorbed they can be used to detect things that are otherwise invisible. It wasn't until after astronomers built observatories that they discovered all the types of stars and galaxies and the history of the universe. Nobody knew they were going to discover it, nobody knows what we might discover with Advanced LIGO. When two massive bodies orbit each other (like for example the Sun and the Earth) they radiate gravitational energy. P = dE/dT = - 32/5 x G^4/c^5 x ((m1m2)^2 x (m1 +m2))/r^5 where P is power (energy over time) E is energy, T is time, d is delta G is the gravitational constant, c is the speed of light, m1 is the first body, m2 is the second, r is the radius between their center of mass. You can plug in the numbers for the Earth, the Sun to get a wattage. Also a wattage for the Earth and the Moon and anything else.
Parodyst1 .. *a* : inference from defective or presumptive evidence *b* : a conclusion deduced by surmise or guesswork *c* : a proposition before it has been proved or disproved
This topic was made much more interesting by how handsome the speaker is. Wow! Would love to have him as my professor. Brains and looks all rolled into one.
All that energy was pump into space and time scatter across the universe as waves. The ability of the universe to consume that much energy shows how vast the expanse of space and time. Am I on the right track? I have no education.
You're almost right, only that energy is only transformed, not consumed, and it's the physical objects responsible for these gravitational waves that are vast, not spacetime itself. Spacetime is only the fabric that involves the interaction between these objects.
maybe hes saying it as being a human and towards humanity it is his its mine its yours. its all of ours. its a huge step. we made essentually sonar for space. we can hear everything now. "im dyslexica sorry if i spelled that wrong". i dont sense "me" its us. hes saying "we" dude alot if you watched it.
What I thought of at 8:45, when Allan described the two gigantically dense black holes whirling around each other, emitted these tremendous forces, is the irony that gravity waves are the weakest forces in the universe. Also, it's time in these talks to really identify what these people are calling waves. I think this is crucial for the rest of us to gain real insight into the processes here. If this force of gravity is tossed out from the swirling black holes, then it sounds like it mirrors the behavior of magnetism, when two magnets would behave in a similar fashion. But if this gravity is being emitted, well, do you really think anything in and of itself moves in a wave form in the vacuum of space? Why would it? What is supporting this shape? Is the gravity some contiguous force that is completely connected to itself, like both ends of a bullwhip snapping? No, it isn't. A waveform suggest the x and y axis of movement. speed and amplitude. If gravity is moving along an x axis, is a wave form, that means it's going above and below the axis as it travels. But think about it. After it moves, say, below the axis, what would make it turn around and then move above it, even if we're really talking about this in 3 dimensions. What? It's not connected to itself..it may be pushed from behind, but that would not make it curve above and below the X axis. So, we need to really understand what these waves are before we can use our imaginations to bring ourselves into these equations.
This is the point where science starts to sound like a religion, when you need to sensationalize your subject so much that it sounds like you're trying to practice apologetics. Curious.
This man is presenting some of the awesomest news of the decade and potentially this century, and the audience don’t bother to give a bit of cheer? SMH
+Yurriaan Van Duyn thats what i hate about TED-X. ted x is not the same as a ted talk, its more of a public thing that anyone can talk in, sort of. its a shame its tarnished the image of ted talks.
alisa lapkina MIT Opencourse ware. Just google it and you should be able to find it, they also have a youtube channel with everything organised into playlists.
in the interests of accuracy and completeness and because a bright and potentially influential person might see this powerful delivery and commit it to memory as a matter of course, it needs to be added that this theory of gravitational waves was at least as old as Albert Einstein and maybe even older. much gratitude to all TED contributors.
+TheKetsa if you don' t like astronomy just don' t watch this talk...in astronomy this is one of the biggest discoveries so if you really like this subject you are certainly really passionated while talking about it
If you fail to understand how he under sensationalised, then you fail to appreciate what this represents, so here goes a back-of-envelope calculation: Two black holes of about 30 solar masses, which are awesome objects in their own right, inspiraled and in the last 0.2 seconds accelerated from rotational rates of 30 to 150 revolutions a second, yet were still separated such that their event horizons had yet to merge. arxiv.org/ftp/arxiv/papers/1608/1608.01940.pdf These black holes at the peak signal were about 350km apart (their non-rotational Schwarzschild radius being about 90km www.e-education.psu.edu/astro801/book/export/html/1836 ), and having nearly the same mass they would orbit around a common centre of mass, so the final orbital velocity is given by Diameter * Pi * rate of rotation = 350km x Pi x 150/second = 164,933 kilometres a second, which is 55% the speed of light. So two 30 solar masses accelerated to this speed in 0.2 seconds, completing about 5 orbits before merging and converted 3 whole solar masses into pure energy.By comparison the Sun looses about 1.5 million tons per second via the outpouring of the solar wind and 4 million tons per second through the release of energy from its internal nuclear fusion. www.slate.com/blogs/bad_astronomy/2014/07/14/solar_wind_versus_fusion_how_does_the_sun_lose_mass.html Over the remaining 5 billion year lifespan of the Sun it will loose just 0.034 % of its current mass to conversion to energy solar-center.stanford.edu/FAQ/Qshrink.html This collision converted 88 times as much mass as our sun will ever do in 1/788,400,000,000,000,000 the time, an energy release rate of 69,564,705,882,352,941,176 that of the Sun. Given the Milky Way is thought to have a total of 200-400 billion stars www.universetoday.com/123225/how-many-stars-are-in-the-milky-way-2/ this momentarily generated more energy than 231,882,352 galaxies !"for that brief moment in time the 'glow' was brighter than all the stars, in all the galaxies, in all the known universe. It was a very big 'bang'"
I agree. Knowing that gravitational waves doesn’t inform much. I want to know how they can be used practically and be applied in everyday life. Or at least be used to find more interesting things about our universe and how it came to be. Gravitational waves may have tons of practical uses but they aren’t detailed in this video.
yeah That's cool and I'm a science keen kinna person but at the moment ( despite all the knowledge that might came out of it) governments are cutting financial help to disable people... therefore I think that some stuff have to be put on hold because Banks behave like black holes , governments obey to them. and week citizens are paying the price... and on the top of that I never thought I could write this.
Humans, at least some humans, seem to have just one essential code that drives everything they do. It's this "I want to understand" code. We are basically stuck in an infinite loop here. Thankfully the universe has a lot of mysterious or some of us with this code would be incredibly miserable people. We're on loop.
Does that mean we could use gravitational waves as a method of transmitting information? After all, gravitational waves aren’t matter, they are the expansion and contractions of space-time itself. That means that special relativity doesn’t apply. They can travel faster than light. So if we could create gravitational waves at a certain frequency, amplitude, etc, couldn’t we use a detector and create an image based on that frequency? And it would be much faster than using what we have now.
No they travel at the speed of light as postulated in Einstein's general theory of relativity. This was also proven to be correct when two correlated signals (one Gravitational the other electromagnetic) were measured by LIGO and a radio telescope (which one I can't remember) and found to coincide in time of arrival.
i have a confusion on LIGO [ Laser Interferometer Gravitational-Wave Observatory] is it possible that it is just detecting the very minute earthquakes which are impossible to detect by other devices due to sensitivity issues.
Some minor comments, observed frequency (signal) seams inverted and recorded as reflection. Yes it is produced by gravitational wave bat it is not gravity wave. Gravity wave is constant and it is equal to time (time wave) and of course sincronized with signal from all black holes in our galaxy (probably univers). PtP measured is around 81 sec in our time scale, this can be applicable to minor posible time correction, respectively in our calendar, correct earth rotation and so on (complete number is much precise and derivate speed of light as higher harmonics). BTW equipment to track such historical event is 1000 times less. Anyway who cares and of course I am completely wrong.
This is so cool! Also, I've been looking everywhere for some information on how theoretically one can enlarge and contract matter (like how he described those gravitational waves) on command with some sort of plausible invention. Does anyone have any sources?
Is it possible we felt something back in September 2015? I remember I felt something unusual. I was resting in bed, had my eyes closed and suddenly I felt this wave passing through me. I saw this weird picture reminding tuning up an old TV or something. My eyes were closed all the time. I also heard some buzzing but it was inside my head. Back then I thought it must've been a plane or something. But it was just too weird. Anyone else felt that?
![Seungmin "그렇게, 천천히, 우리(As we are)" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/kAzmhLHePqU/mqdefault.jpg)
tough crowd
Lol yea I feel for the guy
+undo.kat Dude the speaker is Allan Fucking Adams
He's a great physicist and specialy a great Lecturer (go and check mit 8.04 if you don't belive me)
The point of the talk was Why should this matter to the public?
He gave an excelent explenation on that, it was not about new details of the gravitational waves
Thank you these people are the worst fans ever...I think his colleague is really passionate about his work.
lol if you were asked to give a ted talk, of course you're gonna rehearse. it's not freestyle rapping. and it's recorded so you'd be judged by your colleagues.
I think they have no idea what he is talking about. No idea what blackholes are or do.
The crowd was so dead he made some good jokes :\
+Shwabz Amen, I actually thought it was funnier that he laughed at his own jokes and nobody else did. Especially the awkward silences that followed them.
+JMan I'd like to think that but listen carefully to silence after he makes a point. You can hear people coughing, drinking water, etc. They all
Look like they already know all about gravitational waves they should have got a high school physics class in the audience.
+Shwabz Amen Or perhaps its just going over their heads... it's hard to say
yes, the topic itself is a joke :P (oh snap! lol)
Yes, it’s funny but an audience can do this. After a moment or two nobody dare laugh. They copy each other.
3:15 that mad scientist laugh omg
He sounds like the guy on GTA San Andreas with little helicopter hat and RC toys
I guess they just don't understand the *gravity* of the situation.
+SangoProductions213 eyyy
Get out now!
it doesn't matter's
Good one
Gotcha
i dont think the audience was unresponsive because they didnt care, they were probably having their minds blown, thus, not able to create sounds.
This.
Unlucky Adam, looks like you had a tough room!
This guy teaches Quantum Mechanics at MIT....!!!!
his lectures are the best!!
I wonder how it feels to be called a Nerd...by a school full of nerds!
And he delivers the best lectures !
I understand his enthusiasm, but for anyone interested in something called "What the discovery of gravitational waves means" will be greatly disappointed by this video, since it doesn't say anything about the implications (and or what follows). It's just sharing an emotion.
@@blueckaym he leaved it clear, you will be able to detect things imposible to observe by us now, planets, black holes, the age of the universe, the point of the beginning, understand gravity, probably even create sensors that can detect, lets say people lost in a forest by detecting their particular gravitational signature, detecting incoming asteroids, knowing gravitational waves exist maybe will allow us some day to know how to cancel them etc etc
The crowd does not seem amused. The least they could do is give a wave, but I guess gravity was just too much to bear.
+gdsm93 touche
+gdsm93 Very well played. Thumbs up.
They were captivated by the gravity of the subject matter!
because they totally don't get it. They need to explain it like you are talking to baby.
TED crowd is ded crowd
I've been a huge fan of Dr. Adams ever since I watched his lecture on QM in MIT. I watched literally all his videos on youtube.
I am going through the exact same thing you were going through 5 years ago!
Me too.
"When a kid talks about marhsmallows"
Crowd: WOAHHHH CLAP CLAP CLAP
"When someone talks about a miracle breakthrough of proving einsteins theory."
Crowd:....
seeing his passion and love for physics is so mesmerizing, if only people would value and honor such scientists the world wouldn't have been where it is right now.
Those people are not amused at all...
madvillain! Nice dude
you mean thesame people who believed in science more than the other [party] who cling to their godly faith about some higher being and how climate change is absurd? OK...
Adekunle Owolabi:
No, the people who claim to support diversity while maintaining a white-knuckled grip on arbitrary models of conformity.
i think the surround sound were muted or not recorded in speaker's microphone
Did someone give tranquilizers to the audience?
They just seem awfully unresponsive!
+piranha031091 Free ketamine next door.
+TheFishCostume They were headed for the K Hole conference and stumbled into the Black Hole conference by accident!
They were just being receptive... would you rather want to see them doing the rain dance while this guy was talking?
Science ted talks are the best ones.
The two black holes that LIGO detected actually came from one star if you can believe it! One massive star rotating so fast that when it collapsed into itself the mass coalesced into two separate locations which continued to whirl around each other, until they slammed into each other causing an explosion that literally shook the entire universe. That is amazing.
BS, it was a false detection.
+MARS TV CHANNEL Maybe. Get back to me after you study physics for 40 years, then do another 25 years of testing and experimentation. YOU COMPLETELY WORTHLESS MORON!
+ChaosmanOne BS, there would have been several more detections by now if this had been a real one, given the number of galaxies that is in the range of LICO is claimed to be in the millions. As simple as 123 buddy.
+MARS TV CHANNEL There were more detections in several other places. The one before was a false positive, this one was real and confirmed.
Mastikator
I'm talking about both events, and they were detected - both times - in two places, and what people do not get is that the second one was also a simulation. If not, there would have been at the least several more detections by now, since they claim that this LIGO covers at least a million galaxies, see? Do the math.
In this engaging talk, researcher Allan Adams explains about the story behind the discovery of gravitation waves and what it really means. A very useful for the students of physics & Astronomy. Highly recommended.
When clever people get together anything is possible. It’s incredible stuff, so beautiful listening to the progress.
We'd need the LIGO to detect the crowds reaction.
Dear Mr. Scott Hughes, what a moment!! we can hear triumph in your laugh.
I have had an intuitive understanding of black holes for a little while now. it is so strange, how the dimensions of the universe appear to us humans based on our physical order within the universe. they always make me think of what must exist in order for there to be something new. its so cool that people like me can be fed the basic information on such profound and detailed science and have their own understandings of it.
It takes all the gravity out of a statement when you over emphasise as much as he does
Yup
+Walter Strong Some people are never satisfied.
+zedooncadhz Where is your video ?
+zedooncadhz I saw what you did there. ;-)
+zedooncadhz
as much as this sounds true, you can't blame him, this man showed a passion you rarely see in people nowadays
If Einstein only knew......
well he did, really...
Pauley P Einstein is smiling wherever he is right now.
Those darn gravity waves had 'em transfixed!
Science is probably the weirdest art-form that has ever existed.
+Functional Savants that was a terribly poor troll, sir.
+Darren R
maybe he WAS trolling, but it doesnt invalidate his statement.
just because there are facts and truths as the result of science, it doesnt make it any less beautiful.
many scientists ARE artists to be able to come up with the results that they do with the information they have.
science is every art form
i think what you mean is every art-form is science.
Most science today is just fiction...it is math, not physics... physics came to a halt over 100 years ago with Einstein's nonsensical theories that have sense been proven false. Check out the Electric Universe theory, Wal Thornhill
You guys should disable comments on all of your videos. It's literally a cesspool of ignorance from people who have no experience or knowledge of the video's topic. Great video, happy to be alive for this discovery.
+LP620 So,,,you should decide who is allowed to make comments?
coffeefish No, they should - why are you against this? Read the comments, it's conspiracy theorists, religious morons and childish remarks.
LP620 You have to rise above it and appreciate the fact that, at least people are free to express their ideas. Overall it's a better community than one structured around censorship.
+LP620 Your abuse of the word _literally_ is a cesspool of ignorance.
coffeefish There's nothing wrong with censoring ignorance.
such a wonderful presentation
God I love how he can explain stuff so interesting
We shouldn't blame the audiences, because most of them probably didn't know very well about physics.
Go to the mit opencourseware, watch the quantum physics taught by Allan Adams, you'll find the class is full of laugh and applause.
And according to my personal experience, applause isn't usually heard in classrooms.
Very sincere man. Genius. Loves what he does. Those 3 traits being in the same person is about as rare - sarcasm - as the event he describes.
Black holes colliding in a tenth of a second sounds like a drop of water falling in to a glass.
Anyone ever consider that this is a simple case of: "If we spend enough money to find something, then By God we're gonna find it?"
7:43 I played it back at least 100 times . Have you beaten that or do I hold the world record ? That is the most awesome chirp in the Universe .
I wish this had been longer so that he had the chance to go into more detail as to why this is so significant.
he speaks so well
No fucking way. I was just watching this guy's lectures on QM from MIT (2013). 8.04. Check it out. Very good.
+oobligah Those are great lectures. The closing to the first lecture blew me away.
***** I'm still getting lost in some of the equations.. been 5 years since I did anything like it.
+oobligah FAAAAK!
I knew I'd seen this guy somewhere!
Opencourseware FTW
Excellent illustrations. I was really impressed when he mentioned we can use the G-waves to see beyond the bing bang moment- this is awesome 👏
I can't take TED seriously anymore after watching the Onion Talks :)
the average man didn't think you were nuts. we just didn't have the peer review to believe. but yet, all you are geniuses and we respect you all.
Wow, funny how a simple lego could do that, now only if someone could fix that they hurt while walking on them :D
Fazal828 they'll make moon gravity legos with an orbit that slows your foot down
@@Arthur-rf6rz love this 😂
This is my favourite ted talk of all time.
The Universe speaks to me
Great teacher.....Mankind is fortunate to have such a passionate man.
Okay, wait wait wait... I understand that the further you look, in distance, the "earlier" you're also looking because of the speed of light... But how far would you have to look to see the beginning? Does anyone even know in which direction to look? This is making my head spin... like a blender. >
+MissyLeyneous every part of space is expanding in every direction so i think if you look in any direction you will see the beginning or rather to the point where the space/energy/matter is so dense you can't see through it
PitchBlackFox Maybe, like an expanding bubble? Where the air is everything and the outside of the bubble itself is "the beginning"? Cause then there's nothing to see after that, it just stops...
That's one step removed from making sense, but it's better than before. XD
MissyLeyneous every point is expanding in every direction, think of it like a sheet of rubber with dots drawn on it, as you stretch it out all the dots grow further away from each other. its not an expanding bubble, space itself is streaching
+MissyLeyneous It doesn't neccesarily stop after you reach the end of the observable universe. It's simply impossible to observe, because at that point, the total space between us and that horizon is expanding at the speed of light.
Space is expanding like a sphere growing out in size equally from all points at the same time. So, if you reverse it then you'll ultimately converge at the beginning of its expansion no matter which direction you looked in to see the convergence.
Your lectures on QM are ♥️♥️♥️
deadest audience ever.
Kavindra Mishra deadest talk ever
there was nothing wrong with the guy. very smart and interesting talk.
Pea-brains
R/engrish
I like this kind of reaction. Science should be taken seriously instead of telling stories and jokes
OK. let's get something straight. He says a gravitational wave stretches us, but in truth, we are NOT stretched relative to the space around us, because that space we are in is also stretching. So no wonder we don't feel anything. That's why the LIGO measurements have to cover such a long distance. They have to measure a comparison as one section of space time is stretched and then released.
isn't fascinating that so much energy and mass was consumed to create point something of a second of time/space? also can we use this new knowledge?
TED TALKS makes me positive from the heart. Such as:Makes it grow
Thinking, Stick up, Self-confidence, Values. I respect TED TALKS from my heart.
It's not the fault of audience bcz even scientists took a huge time to detect gravitational waves , so how these people can understand that in just 11 minutes speech ....
I understand what gravitational waves are, but one thing baffles me. What if there were multiple sources of gravitational waves all around us? That would mean we are bombarded by gravitational waves from all around the place. How does the stretching and expansion of the gravitational waves behave if we take that into account? If there are gravitational waves coming from the left and from the right?
Luckily, events that are large enough for us to detect are fairly rare. This means that we measure isolated collisions or mergers and can pin-point them with great accuracy in the sky. Soon we will be able to tell not only where they come from but also the wave polarization which will tell us even more about the event being measured.
4.5 mil subs yey
The clock has still not moved much near those 2 black holes!
What a dull audience.
agreed me
did you just agree with yourself
After one year
Einstein, how lucky for us he was given the chance to advance civilization. What a different world we would have today without him. It took about 100 years after he predicted gravitational waves, through his general relativity, to prove they exist.
I wonder if gravitational waves could one day be used to map the universe?
The universe is constantly changing so probly not
But wouldn't gravitational waves allow us to track and monitor those changing objects over time?
iliketrains0pwned Yes, but we don''t know if they are constant, if not then yes, but it would be quite futile because we wouldn't get there.
Stormy Clouds At that moment the two wave would combine as do sound waves. So yes.
iliketrains0pwned:
Gravitational waves may provide details about our 'universe' prior to singularity, but they are theoretically limited to the speed of light. Since our cosmic bubble is expanding faster than the speed of light, our species will blink out of existence in relative blindness. *enjoys coffee
Kudos on this video. This is the best summary of this discovery that I've seen anywhere.
He didn't tell us what it means, he told us they had been detected using a new tool.
+elfspicer I felt i was the only that noticed this, the guy just went on and on about LIGO didnt mention anything about what it means to use today
This tells us that we can gain new insights just by becoming better listeners
Thumbs up if you also felt the gravitational force on sept 14th 2015. B)
+Top 5 So thats why i woke up with expanded space in my pants. and why it didn't last long :/
thought that was an earthquake, according to my journal.😎
The dude is a classic!. Great TED video. Good teacher.
when he is done can he figure out how to clean the water in flint michigan please?
that's not his job, its yours.. if that is what you are passionate about.
Ernie Stars well put.
I am going to edit this video. I'm going to put some realistic laughs after his jokes, the boy deserves it.
*comment section analysis!!!!!!!*
2% this guy is so nerdy and smart omg queen
3% omg im mindblown
95% *WHY DIDNT THE AUDIENCE LAUGH AT ANYTHING ARE THEY DEAD??????*
How do they estimate distance and how long ago the event occurred?
So what do they mean???? Nothing but history and metaphors in this speech. "You can hear the universe speaking to us." Tell us what it means in basic principles of physics, which we all know and don't need metaphors for.
so you expect him to explain the "basic" physics & math behind general relativity that even got Einsten confused?
+starczarar Waves like sound and light can both be used by humans to gain information about the world around us. So what this means is that now gravitational waves may also be used to learn about events that we otherwise would have never observed. This may lead to new insights, which is the whole purpose of science :)
+starczarar It means that gravitational waves are real and since they do not interfere or get absorbed they can be used to detect things that are otherwise invisible.
It wasn't until after astronomers built observatories that they discovered all the types of stars and galaxies and the history of the universe. Nobody knew they were going to discover it, nobody knows what we might discover with Advanced LIGO.
When two massive bodies orbit each other (like for example the Sun and the Earth) they radiate gravitational energy.
P = dE/dT = - 32/5 x G^4/c^5 x ((m1m2)^2 x (m1 +m2))/r^5
where P is power (energy over time)
E is energy, T is time, d is delta
G is the gravitational constant, c is the speed of light, m1 is the first body, m2 is the second, r is the radius between their center of mass.
You can plug in the numbers for the Earth, the Sun to get a wattage. Also a wattage for the Earth and the Moon and anything else.
+starczarar It's a talk, he's obviously not there to give lectures on Astrophysics and make you _understand_ the theories.
+starczarar It's a talk, he's obviously not there to give lectures on Astrophysics and make you _understand_ the theories.
Damn, this was so exciting. Why was the audience so dead?
Pure conjecture.
+BloodTar noun: conjecture; plural noun: conjectures: 1. an opinion or conclusion formed on the basis of incomplete information.
Parodyst1 ..
*a* : inference from defective or presumptive evidence
*b* : a conclusion deduced by surmise or guesswork
*c* : a proposition before it has been proved or disproved
+BloodTar
Real measurable results.
This topic was made much more interesting by how handsome the speaker is. Wow! Would love to have him as my professor. Brains and looks all rolled into one.
All that energy was pump into space and time scatter across the universe as waves. The ability of the universe to consume that much energy shows how vast the expanse of space and time. Am I on the right track? I have no education.
You're almost right, only that energy is only transformed, not consumed, and it's the physical objects responsible for these gravitational waves that are vast, not spacetime itself. Spacetime is only the fabric that involves the interaction between these objects.
CΔPITΔL transformed to what? .. No heat or light or radio waves
feras ashmar that's the question people interested in dark matter/energy is asking
How did LIGO calculated mass of blackholes one is 36 sun and other is 29 sun by just hearing it?
This guy speaks as if he found it.
maybe hes saying it as being a human and towards humanity it is his its mine its yours. its all of ours. its a huge step. we made essentually sonar for space. we can hear everything now. "im dyslexica sorry if i spelled that wrong". i dont sense "me" its us. hes saying "we" dude alot if you watched it.
+Kristy Redden hmm
What I thought of at 8:45, when Allan described the two gigantically dense black holes whirling around each other, emitted these tremendous forces, is the irony that gravity waves are the weakest forces in the universe. Also, it's time in these talks to really identify what these people are calling waves. I think this is crucial for the rest of us to gain real insight into the processes here. If this force of gravity is tossed out from the swirling black holes, then it sounds like it mirrors the behavior of magnetism, when two magnets would behave in a similar fashion. But if this gravity is being emitted, well, do you really think anything in and of itself moves in a wave form in the vacuum of space? Why would it? What is supporting this shape? Is the gravity some contiguous force that is completely connected to itself, like both ends of a bullwhip snapping? No, it isn't. A waveform suggest the x and y axis of movement. speed and amplitude. If gravity is moving along an x axis, is a wave form, that means it's going above and below the axis as it travels. But think about it. After it moves, say, below the axis, what would make it turn around and then move above it, even if we're really talking about this in 3 dimensions. What? It's not connected to itself..it may be pushed from behind, but that would not make it curve above and below the X axis. So, we need to really understand what these waves are before we can use our imaginations to bring ourselves into these equations.
No patience for all this acting.
0:50 well..... that joke didn't turn out as expected
Ikr....too many failed attempts 😂
or any of jokes for that matter
+OneBadRudeBoy That audience seemed fucking dead
+OneBadRudeBoy It was a good joke tho :-)
+OneBadRudeBoy i enjoyed it
Amazing!!! Im so awe struck that thats the only word i can think of.
This is the point where science starts to sound like a religion, when you need to sensationalize your subject so much that it sounds like you're trying to practice apologetics. Curious.
because modern "science" is a religion. It's god is Satan
@@masterbetty3020 is it religion to study things around us ?
This man is presenting some of the awesomest news of the decade and potentially this century, and the audience don’t bother to give a bit of cheer? SMH
hiss
+ChaoticDc pls
You forgot to mention that those detectors sensors were in diagnostic mode when they actually herd the ripple.
Not this feminist bullsh*t again. Ow wait, finally an actual TED video! :D #OldTimes
+Yurriaan Van Duyn thats what i hate about TED-X. ted x is not the same as a ted talk, its more of a public thing that anyone can talk in, sort of. its a shame its tarnished the image of ted talks.
There are some fantastic Ted-X talks man, what are you on about?
i'm currently watching his quantum mechanics course on ocw mit! allan adams is amazing!!!
+Walter White could you please clarify -where? i'd like to watch too:)
alisa lapkina MIT Opencourse ware. Just google it and you should be able to find it, they also have a youtube channel with everything organised into playlists.
I have never hear about it, thanks a lot! :)
Enjoy your lies
oh.... its all still theory...
+lloyd wilson so is atomic theory and germ theory, now lick this penny
PitchBlackFox indeed.
you say that like its a bad thing, "oh this hypothesis has never been proven incorrect throughout hundreds of experiments, pffft"
Shithead B he's being facetious
Ferenc Hackfelner then prove it wrong and win a Nobel prize
in the interests of accuracy and completeness and because a bright and potentially influential person might see this powerful delivery and commit it to memory as a matter of course, it needs to be added that this theory of gravitational waves was at least as old as Albert Einstein and maybe even older. much gratitude to all TED contributors.
Very annoying guy, stop sensationalizing so much....
+TheKetsa let me guess, Trump is the real sensation. :/
+TheKetsa if you don' t like astronomy just don' t watch this talk...in astronomy this is one of the biggest discoveries so if you really like this subject you are certainly really passionated while talking about it
+TheKetsa He's too passionate about his job.
God forbid someone actually be passionate about a topic...
If you fail to understand how he under sensationalised, then you fail to appreciate what this represents, so here goes a back-of-envelope calculation: Two black holes of about 30 solar masses, which are awesome objects in their own right, inspiraled and in the last 0.2 seconds accelerated from rotational rates of 30 to 150 revolutions a second, yet were still separated such that their event horizons had yet to merge. arxiv.org/ftp/arxiv/papers/1608/1608.01940.pdf These black holes at the peak signal were about 350km apart (their non-rotational Schwarzschild radius being about 90km www.e-education.psu.edu/astro801/book/export/html/1836 ), and having nearly the same mass they would orbit around a common centre of mass, so the final orbital velocity is given by Diameter * Pi * rate of rotation = 350km x Pi x 150/second = 164,933 kilometres a second, which is 55% the speed of light. So two 30 solar masses accelerated to this speed in 0.2 seconds, completing about 5 orbits before merging and converted 3 whole solar masses into pure energy.By comparison the Sun looses about 1.5 million tons per second via the outpouring of the solar wind and 4 million tons per second through the release of energy from its internal nuclear fusion. www.slate.com/blogs/bad_astronomy/2014/07/14/solar_wind_versus_fusion_how_does_the_sun_lose_mass.html Over the remaining 5 billion year lifespan of the Sun it will loose just 0.034 % of its current mass to conversion to energy solar-center.stanford.edu/FAQ/Qshrink.html This collision converted 88 times as much mass as our sun will ever do in 1/788,400,000,000,000,000 the time, an energy release rate of 69,564,705,882,352,941,176 that of the Sun. Given the Milky Way is thought to have a total of 200-400 billion stars www.universetoday.com/123225/how-many-stars-are-in-the-milky-way-2/ this momentarily generated more energy than 231,882,352 galaxies !"for that brief moment in time the 'glow' was brighter than all the stars, in all the galaxies, in all the known universe. It was a very big 'bang'"
Why would anyone dislike this video???
What a pointless talk.
I agree. Knowing that gravitational waves doesn’t inform much. I want to know how they can be used practically and be applied in everyday life. Or at least be used to find more interesting things about our universe and how it came to be. Gravitational waves may have tons of practical uses but they aren’t detailed in this video.
yeah That's cool and I'm a science keen kinna person but at the moment ( despite all the knowledge that might came out of it) governments are cutting financial help to disable people... therefore I think that some stuff have to be put on hold because Banks behave like black holes , governments obey to them. and week citizens are paying the price... and on the top of that I never thought I could write this.
Humans, at least some humans, seem to have just one essential code that drives everything they do. It's this "I want to understand" code. We are basically stuck in an infinite loop here. Thankfully the universe has a lot of mysterious or some of us with this code would be incredibly miserable people. We're on loop.
so exciting! I hope I won't die before they explore the universe through gravitational waves.
great talk again .
The sound of black holes colliding was phenomenal,
Does that mean we could use gravitational waves as a method of transmitting information? After all, gravitational waves aren’t matter, they are the expansion and contractions of space-time itself. That means that special relativity doesn’t apply. They can travel faster than light. So if we could create gravitational waves at a certain frequency, amplitude, etc, couldn’t we use a detector and create an image based on that frequency? And it would be much faster than using what we have now.
No they travel at the speed of light as postulated in Einstein's general theory of relativity. This was also proven to be correct when two correlated signals (one Gravitational the other electromagnetic) were measured by LIGO and a radio telescope (which one I can't remember) and found to coincide in time of arrival.
i have a confusion on LIGO [ Laser Interferometer Gravitational-Wave Observatory] is it possible that it is just detecting the very minute earthquakes which are impossible to detect by other devices due to sensitivity issues.
This was incredible.
Some minor comments, observed frequency (signal) seams inverted and recorded as reflection. Yes it is produced by gravitational wave bat it is not gravity wave. Gravity wave is constant and it is equal to time (time wave) and of course sincronized with signal from all black holes in our galaxy (probably univers). PtP measured is around 81 sec in our time scale, this can be applicable to minor posible time correction, respectively in our calendar, correct earth rotation and so on (complete number is much precise and derivate speed of light as higher harmonics). BTW equipment to track such historical event is 1000 times less. Anyway who cares and of course I am completely wrong.
This is so cool!
Also, I've been looking everywhere for some information on how theoretically one can enlarge and contract matter (like how he described those gravitational waves) on command with some sort of plausible invention. Does anyone have any sources?
I love how passionate he is
Is it possible we felt something back in September 2015? I remember I felt something unusual. I was resting in bed, had my eyes closed and suddenly I felt this wave passing through me. I saw this weird picture reminding tuning up an old TV or something. My eyes were closed all the time. I also heard some buzzing but it was inside my head. Back then I thought it must've been a plane or something. But it was just too weird. Anyone else felt that?
You can't feel gravitational waves, they're undetectable to the human senses
Nice way of presentation
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Tam anlamıyla tüyler ürpertici 🙈
Information can never be destroyed