So, at 28:00 he's saying that they detected a gravitational wave caused by two neutron stars colliding, and so telescopes were pointed at that direction... now, if grav waves travel at the speed of light, and light travels at the speed of light... wouldn't the grav wave and the light reach earth at the same time? And if so, when you point the telescopes, it should be too late to see it happen... Can someone explain me if I am missing something?
I guess they'd be looking for visual evidence of the aftermath of a collision - e.g. debris, gas and/or glowing dust orbiting in the vicinity of the resulting black hole.
As far as I heard him, the vibrations start before the actual event. As the stars are furiously orbiting each other, getting closer and closer to the event, at some point before the actual merge, gravitational waves are being produced with the strongest disturbance come last, from the merge itself. So you have a finite amount of time to point your telescopes and hope you get lucky. He didn't say aftermath and I believe he would have. I might not have it right with my understanding, but he definitely says they saw the event itself.
My son sent an email to Lawrence Krauss some years ago - and got a fascinating reply. Now he is doing a PHD in particle physics -and goes to Cern from time to time :-) Thanks Lawrence ! Wonderful stuff !
Krauss has been obliterated and exposed as a substandard physicist in the NY Times article of March 23 2012 by Columbia University Professor of Philosophy David Albert. (Professor Albert has also written a textbook on Quantum Mechanics).Never has a book by a physicist been so annihilated in a NY Times article for at least 2 decades. Krauss says some of the dumbest comments imaginable and can hardly state he is a qualified physicist because he is not.
The sound sucks because we can't hear the audience, Krauss made some jokes in his talk and I'm sure people laughed at some moment and we can barely hear it.
Man, I could listen to Professor Krauss speak all day. He makes it easy for me to understand anything he's describing. I don't have any kind of degree but still it is so much fun ingesting whatever comes out of his mind.
I'm an old man with more than one academic degree. It occurred to me while watching this that in my youth we spent as much time and effort reaching places that offered learning, as we spent in the learning process itself. We had classrooms, libraries and publications.... period. These days I'm certain that anyone can reach the same level of education by having a laptop and never leaving their sofa.
I am also an old man, who never graduated high school. I did learn one thing while I was there, They don't teach you how to think, they only teach you how to memorize stuff and then regurgitate it on a multiple guess test. And you are exactly right I have learned most things on my own from the same books and publications you all read at University, and I have learned a great deal, I just don't have sheep skins hanging on my wall! That being said, being privy to that same knowledge I came to a different conclusion, Einstein was wrong. None of his theories adequately explain even the most simple natural phenomenon without resorting to enormous, pages long equations that practically no one can understand. Math is not science. Particle physics is dead. Nikolai Tesla had it right when he said: "Everything is fields and fields are not particles." Field theory explains all these things much more simply and Elegantly as Occams razor Illustrates. Thanks for reading to the end.
@@imnewtothistuff - Yes, Einstein, and Newton was, and is still wrong on the Gravity thing, as U said, "math is not science", physical science. There's physical evidence showing downward falling motion is caused from trapped gas molecules, and not Gravity. You/ Tesla " particle physics is dead ." "Everything is field and field is not particle." I don't know anything about the physics field theory, your help is needed ! Not an export, but I've tried to follow particles physics in motion, ATOMIC MOLECULAR MOTION, from atmospheric gases through the human body and deep within earth's core, and haven't found where particle physics of ATOMIC MOLECULAR motion is not needed, not even a ring the bell moment waking up one's mentality saying something is wrong, particle science is dead, and no longer needed. Here's where You comes in. Where's do a FIELD gets it's motion ? Are the motion within our body and those of flames driven by ATOMIC MOLECULAR ENERGY FLOW or by FIELDS ? Can FIELD energy be held in the palm of my hands ?
Darn right. Even when I was in college 20+ years ago it turned out the value of my degree was effectively 0. And I got several degrees in engineering. I had been sold on this lie that "continued education" i.e. college was SO important and valuable and all I did was waste 5 years with it.
@@imnewtothistuff You are evidence that there's still a need to teach people how to think, rather than just making knowledge available on the internet.
I was very impressed with the questions. These kids are well versed in this esoteric subject matter and could express complex questions in a foreign language. Ukraine has a bright future.
each time he give a lecture in the usa people ask him about god ? good to see these students have a grasp on theoretical physics. english may not be there first language but it's not for a lot of Americans either.
@French Frys I'd let you borrow my hat for a while if I could. I'm not used to coming in second for the opportunity to set the record straight. But damn, nice one...
As I watch this fascinating lecture by Dr. Krauss and the subsequent Q&A session in May 2023, my heart aches. This was an event in Kyiv; a little more than three years before Putin's criminal invasion of Ukraine. The students at this lecture were so well-spoken, so thoughtful, and so eager to learn. It disgusts me that their lives have been so damaged by this monster. If any American doubts that we should provide the maximum support for Ukraine's defense, they should watch the Q&A session. The students of Kyiv will change your mind.
Another fine lecture by Prof. Krauss I'd never seen before and I learned something new, that gold is made in the collision of neutron stars. I was struck by the standard of the questions by Russian people, I think they were among the best I've heard. For me, science is the spice of life.
I think I spelt it right. He is very well read and certainly has more abilty than most of us so I cannot see what is wrong with the comment. Have you veiwed his other discussions?
... a slightly manic romp through the Big Bang and some of it's effects - but the enthusiasm of the audience and the quest for knowledge was really refreshing! Thanks for posting!
Matt Magic Yeah I also got tired of hearing about Stephen Hawking's irrational fear of aliens over the years. The probability of another civilization being active right now in the galaxy is probably infinitesimal, and why the fuck would they fly spaceships for hundreds of years just to harass our tiny planet, even if we did make contact through SETI. It's absurd.
Love his lectures. This one is my most admirered...so much energy, so much intelligence of audience. L.k. has a Very god brain. Good comedian too. Makes physics easier than taking a coffee physic. One correction though....my italian aunt made the universe when she forgot that her pasta fazzoli soup was cooking on too hot of a flame and pasta exploded across the universe. The movie of this event is in production right now. Prof. Krauss wrote the screenplay.
Thank you Lawrence for another awesome lecture, loved it. Only thing I can contribute is 28:50 is not New York bro, it's Chicago. Other than that, perfect.
Very exciting. But most important is Q&A at 1:14:30!!! It should be shouted out loudly in every tv news show on the whole world. It's two minutes before twelve!!!
I want him to explain why my cat won’t eat his Benevo vegan cat food. He caught a mole and a mouse and was giving me the evil eye. I had to make sure he gets his fancy feast. But, like, the vegan food had all the minerals he needed to be nourished.
A digital clock can display numbers based on how many times a crystal vibrates, but it doesn't measure actual time...just counts crystal vibrations. Clocks and other timekeeping devices are the tools we use to measure time. They work by making consistent and accurate counts of specific physical phenomena, such as the oscillations of a quartz crystal, the vibrations of a pendulum, or the decay of radioactive elements. These phenomena are used as references to mark the passage of time, but they are not time itself. In physics, time is considered a dimension that, like space, is affected by gravity and other fundamental forces. The concept of time is still being studied and debated by scientists, with different theories about its nature and properties.
Thank you for the video. In this video, you mentioned that two black holes combined and released lots of energy. Question: Where does this energy go? Does it replenish sun’s dissipated/ radiated energy?
No, stars are not replenished. It is this energy that makes gravitational waves, and is propagated through the universe as gravitational waves, for billions of years.
if somthing in space sounds imposible to me, matter just dont call any matter, matter has intimal call to some matter not just any matter, like the planets they belong mercury with neptune, venus with uranus, earth with saturn and yes marswith mercury making 4 pairs one positive, one negative each one making a union for making an entangled planetary sistem
a power stroke has its limits so any thing that is hot, it spreads arround its system if so as novaes in the skie, they are beating electric herts of the sky.
To those of you thinking the audience is unresponsive. Remember this is the Ukraine, not the USA or England. I have seen other lectures there. They are just quieter and not as demonstrative. It's a different culture, folks. I am amazed at the number of people in the Ukraine who, at least, understand English. In the USA people have been detained by the police for speaking a language other than English. One foreign student, who didn't understand a cop screaming for him to get on the ground was shot and killed. Here in Texas, it's not so bad, as we have many Spanish speakers. Texas was once a Mexican state.
In mathematics, a zero-dimensional topological space (or zero-dimensional space) is a topological space that has zero dimension with respect to one of several inequivalent concepts that assign dimensions to a given topological space. The graphical representation of a zero-dimensional space is a point.
I have a question here. So at 22:22, Krauss says that a 36 solar mass black hole merged with a 29 solar mass black hole to produce a 62 solar mass black hole and 3 solar masses of gravitational radiation. I understand that the entropy and the information contained within a black hole is in proportion to its surface area. So 4*pi*r^2 means that 62 solar mass black hole has 1.799 times the combined surface areas of the 2 black holes that merged to form it. That means it has 1.799 times as much information........ well I keep hearing these "physics for laymen" lectures say that information is conserved, that it can't be destroyed, and that because the laws of quantum mechanics are time reversible, it can't be created either. But there's 1.799 times as much information after the merger as before, and that's just in the resulting black hole, that's not even counting the information carried off by the gravitational radiation. Does this not disprove the claim that information is preserved? It nearly doubled, or possibly more than doubled, but at least multiplied by 1.799, a massive amount of information. Am I the only one to notice this inconsistency?
The answer to the gauge group of general relativity is that it depends on formalism. In standard formalism it's the diffeomorphism group and in the vielbein formalism it's local lorentz group.
What is wrong with this audience? Is this a cultural thing in Ukraine to be extremely dull and quiet during an enthralling lecture on one of the most remarkable achievements of mankind in recent times. Even semi-science literate audiences in the west would be transfixed let alone university science students. Kudos to Professor Krauss for breaking it down with such eloquence.
O the next forty years will be exciting! Survival in the most basic of ways, with these little nuggets of far away things tucked away, transformed into stories and myths once again.
At one point he says essentially that the two black holes reacted to form one black hole with slightly less mass than the original and also a bunch of gravity waves. So, my question is how can that energy be recovered?
I also want to know how prevalent those gravity waves are and how energetic are they. Is there enough energy being conveyed through local spacetime by a "background noise" of gravity waves to act as a power source?
aske a doctor and are the same as a pulsing heart, why not the pulse of beating electric energetic out side universe that joins with as as so many others around?
Faster than lights rate of induction. Travel along the edge of the coaxial circuit of the Inertial plane, like the electron vortex along a wire. Gravity is centripetal acceleration of incoherent matter into the Inertial plane. Magnetism is centripetal acceleration of coherent matter into the Inertial plane.
2 neutron stars colliding give an intrinsic reaction, 2 black holes colliding give an extrinsic reaction both propergate G waves and a black hole actively consuming a star doesn't generate any G waves nor even upon discharge or when t=0. approches
In the same way production follows the design and engineering of a product. Curious to know how often the theoretical leads the experimental, or vice versa, and what determines which leads.
What would cause a star to collapse? Gravity? And if space is moving away from us at the speed of light how can we ever claim to have found the outer edge, ie: the big bang?
as a star loses its outer fuel the central gravity can not contain its outer core it then enters red giant state. we can see that happening now with the star beetlejuice wich was a yellow sun like our own. as the weakens the gravitational pull becomes so great it collapses in on itself becoming a black hole or a neutron star depending on its mass.
More or less it's the same process as figuring out the source of a sound by hearing it. With only one ear u couldn't figure out, but with 2 ears you can because the sound wave gets first one ear and after a very short amount of time then gets the other, and your brain does the calcullation automatically. So the key here is to have more than one detector. They were able to locate the neutron's star collision in the sky because that collision was detected by three detectors, the 2 from LIGO in EEUU and the detector Virgo in Pisa (Italy). More detectors u have, more precise u can locate the source.
"Every atom in your body came from a star that burst. And, the atoms in the left hand probably came from a different star than your right hand. It's really the most poetic thing I know about physics: they're all stardust. You could not be here if stars had not exploded, because the elements - carbon, nitrogen, oxygen, iron, all the things that matter for evolution - were not created at the beginning of time. They were created in the nuclear furnaces of stars and the only way for them to end up in your body is if those stars were kind enough to explode. So forget about Jesus. The stars died so they could be here today. " Lawrence Krauss, 2009
Ok, so when two black holes merge, the mass of the new black hole is less than the mass of the two initial block holes. The difference in mass has been converted into gravitational waves. What I don't understand is precisely *what* within the black holes has been converted to gravitational waves? Is it protons, neutrons, photons, or what? For example, if it is electons that are converted, then does this mean the total number of electrons after the merger is less that the total number before? If so, what is the mechanism by which the particles are converted? And if instead of two black holes colliding it was two massive stars, would we still get gravitational waves? Would the merged stars also be less massive than the two initial stars? Would the stars also have lost some particles as they are converted to gravitational waves? Again, what is the mechanism by which the particles get converted?
@@biggstavros5876 A layperson asking relevant questions is an intellectual, not a pseudo-intellectual. As for the questions, one of them is answered in the talk. Lawrence mentions waving your arms around technically creates gravitational waves (effectively indiscernible, but still), so the same is certainly true about stars colliding. He also specifically mentions that stars colliding would not create strong enough gravitational waves for us to currently detect.
It's not that "particles are converted", that is not the fundamental ones. Most of the "mass" of a proton or neutron for example is really in the form of energy, the gluons that hold (=work/energy) the quarks together to make the proton or neutron, over 90% in fact. That is, more than 90% of an atom's mass is already energy (m=e/c^2) that we perceive as mass! Smash it to bits and presto, lots of quarks and HEAPS of unemployed energy, a portion of which bends space/time (energy curves space/time) in a shuddering way that seems wave like.
Hi Eyles. Yes - any movement of any mass creates gravitational waves. The G waves we have observed so far, appear to emanate from Neutron stars colliding. The mediators of the waves are called 'gravitons', though the theory is incomplete in the description of the process. See, for instance: en.wikipedia.org/wiki/Graviton
I had a couple of other thoughts to try to make it clearer. If you wave your arm, you are creating G waves - but they are so incredibly small and weak, we cannot (yet!) detect them. A Gravity wave is a disturbance in the spacetime continuum and those we have detected are still extremely small due to distance, but the masses have been great, and the energy to throw the mass around was truly enormous, affecting the spacetime like a large pebble thrown in a pond. Hope this helps :0)
so where does the gravitational wave energy from all the black hole 🕳 🕳 collisions during the lifetime of universe went? Dont tell me beyond the observable universe because from there other waves 🌊 must come in too. Why dont we observe roaring noise of gravitational waves background?
How do you want to observe gravitational noise? What would you expect to measure if there was one? Keep in mind noise smooths the amplitude, so noise is something that makes it harder to detect an event, as opposed to being something detectable in itself. I suppose as we increase resolution of gravitational wave detectors, we will see more and more collisions further and further away, then we will start to observe not just collisions but super massive objects moving, then less and less massive objects further and further away, and only then we might see a background noise.
Kajko Kokosz same like any kind of noise and same as gravitational signal. observe its waveform on the detector. noise doesnt smooth amplitude of anything. its additive. I think your statement is false. I think You are incorrectly claiming that noise is undetectable.
@@charlieangkor8649 I didn't say noise is undetectable, just that you need much higher resolution for that. I'm not an expert, so I don't know if at our current technology, placing lasers across the Solar System would be enough, maybe. There's another problem: how do you differentiate gravitational noise from measurement error noise? As for the amplitude - draw a sinusoide. Now add 2 to all of it - it's still the same sinusoide, just with an offset. Sure, if you have something like a black hole collision, you have a spike. If you have something less significant, happening 10 times a second, you have a lot of microspikes. This is what I described as more and more things becoming visible as you increase the resolution. But the way I understand your initial proposal is that random events would sometime produce many microwaves in the same moment that would cause an (constructive) interference, which outcome is such a strong wave, that is now picked by the detector. Problem is, waves will interfere this way half of the time, and another half of the time it will be a destructive interference, where they cancel each-other out. If you look at a distribution curve, as you increase the number of samples, the curve becomes more and more smooth, because the statistical error decreases. So the more sources of gravitational waves, the smoother the curve, and as every little piece of mass is a source of gravitational waves, I would expect, perhaps wrongly, that therefore gravitational noise is too smooth to be detected with any technology conceivable today.
It's the standing still that gets you to the speed of light .The thing is spreading out from our point of view so every thing is spreading out. So finding the point of starting walking towards it would be a quantum to reseed the time of light that's bending space at zero energies
What causes the gravitational wave, is it like a photon? Or is it a ripple in the Higgs field? I guess what Einstein said “there is no gravity, it is curved space-time” since time is not a fabric and not an object, it’s just a comparison of relative movements, it’s finally showing to be wrong? I noticed the explanation said space itself is waving, so I assume that atoms and molecules are shrinking and expanding in one direction? This explanation leaves out time, as I think it should. I always thought space-time fabric was a fabrication anyway! We should be able to replicate gravitational waves by using some extremely heavy heavy weights smashing together very close to the detectors. If that doesn’t work, I would say our understanding of gravitational waves is wrong.
water has 3 states and water is comparable with electricity, then light waves on its own its hot and cold and were you see this 2 there is a meadle one made by theme and were this three are they make a 4th (the system). What cosmologists have miss to take in acount are the 7 wave lenght steps since they found them and almost keep them in asecret cause of all the videos I have seen( many) no body speaks, exept for one hes name was ALTON HARP in the video ALTON HARP INTRINSIC RED SHIEFT, Ifound this video in YOU TUBE in THE EU,this video helped me to solve many cuestions, it seems it does not tell you a lot but 7 steps in wave length tells you a lot: It tells that Einstein is wrong wene he says that light blue and violet are havier than WHITE in the video LIGHT AND DARK 1 OF 2 - LIGHT directed by JIM AL- KHALILI. almost at the beggening he says that back in the erliest times of physics came out the ULTAVIOLET CATASTROPHY that led EINSTAIN to the conclusion that violet and blue were havier than the rest of the other lights by those times.The next might change this point of vew : wene you start to pedle the first light that comes on is red, folowing orange, yellow then white to stay in the most in it with an exeption that a bit of yellow kind of appears(wene the fastes at pedling. the reason to me is another and goes like this : at the beganing of pedling the dinamo starts to absorb the red masses that are the outer orbits that the dinamos magnetics open(amplified) territory, by absorbing red violet is out, then comes orange and blue is gone, time for yellow and green is vanished then comes white in the most cause a bit of yellow apears trying to fill space with the push of white that tryes to fill the empty space matter absorbed by the dinamo. This same exemple shows that even the small solar systems(atoms) behave or work the same as the big systems(DNA, STARS, GALAXIES ETC). With it i sugest that the universe matter is areinged as a rainbow, that matter follows such order since each element has its own color and vise verce. so I can say that the universe temperature is not about the same cause is beeing demontrated that each color has diferent temperatures, density, wave lenght as well is clear to me diferent light speed caused by the density of each color.
From electron to proton the mass difference is huge. This is a kind of multiverse theory where the parameters could be a little different and so many other big bang and universes.
Yaaaay......a new Lawrence Krauss video! I hope he's back for good. I just noticed this lecture was in Ukraine. .....so I guess he's not "back" yet. lol
How do we know that the detected gravitational wave event wasn't an earth-based, brief, plate tectonic slip that was located half way between the two sites? EDIT, I wish he had said a seismic event looks like this and not like that, therefore we can rule that out.
"No device can produce sum useful energy in excess of the total energy put into constructing it. Time taken to stock energy required to build an energy-producing device of useful work added to the time building the device, will always be longer than the entire useful lifetime of the device" (The Fifth Law).
![Infinite-dimensional aspects of one-dimensional stochastic flows [parts 3-4 of 4]](http://i.ytimg.com/vi/MAIReI0OanA/mqdefault.jpg)
![Infinite-dimensional aspects of one-dimensional stochastic flows [parts 3-4 of 4]](/img/tr.png)
So, at 28:00 he's saying that they detected a gravitational wave caused by two neutron stars colliding, and so telescopes were pointed at that direction... now, if grav waves travel at the speed of light, and light travels at the speed of light... wouldn't the grav wave and the light reach earth at the same time? And if so, when you point the telescopes, it should be too late to see it happen... Can someone explain me if I am missing something?
I guess they'd be looking for visual evidence of the aftermath of a collision - e.g. debris, gas and/or glowing dust orbiting in the vicinity of the resulting black hole.
@@ftumschk ah! That makes sense! Thanks :)
As far as I heard him, the vibrations start before the actual event. As the stars are furiously orbiting each other, getting closer and closer to the event, at some point before the actual merge, gravitational waves are being produced with the strongest disturbance come last, from the merge itself. So you have a finite amount of time to point your telescopes and hope you get lucky. He didn't say aftermath and I believe he would have. I might not have it right with my understanding, but he definitely says they saw the event itself.
Franco Pellegrini its ABSOLUTE GARBAGE. THE MAN IS PSYCHOTIC.!!! YOU NEED TO PRAY FOR HIS MENTAL HEALTH!!!
@@christinevincent996 You need to calm down...
My son sent an email to Lawrence Krauss some years ago - and got a fascinating reply. Now he is doing a PHD in particle physics -and goes to Cern from time to time :-) Thanks Lawrence ! Wonderful stuff !
He is a wonderful man. He wrote a beautiful reply letter to my son.
IThinkWithMy Dick
Wanna hear a prison rape story?
@@Chris-qu2qy Yes, Americans are inclined to the see bad first in everything, they seem to equate accusations with facts, which they not.
That's probably why Cern haven't discovered anything since the Higgs boson.
who is this a dig at? Wrong on both counts.@@budweiser600
His enthusiasm is infectious.
So are his genitals.
Umm.. contagious?
His gestures also creates gravitational waves that could be detected on far away binary neutron stars.
That's what science education is about. Or any education for that matter. If you can get people excited they'll do the rest themselves (:
That and the STDs.
Another amazing lecture by Dr Krauss. As usual, educational and fun!
Physics spoken with an intellectually good sense of humour, bloody brilliant
Krauss has been obliterated and exposed as a substandard physicist in the NY Times article of March 23 2012 by Columbia University Professor of Philosophy David Albert. (Professor Albert has also written a textbook on Quantum Mechanics).Never has a book by a physicist been so annihilated in a NY Times article for at least 2 decades. Krauss says some of the dumbest comments imaginable and can hardly state he is a qualified physicist because he is not.
Excellent talk! Also, excellent production values, with great camera work and sound!
What??? the sound sucks. Video OK though.
The sound sucks because we can't hear the audience, Krauss made some jokes in his talk and I'm sure people laughed at some moment and we can barely hear it.
Man, I could listen to Professor Krauss speak all day. He makes it easy for me to understand anything he's describing. I don't have any kind of degree but still it is so much fun ingesting whatever comes out of his mind.
I cant eat it all yet.
I'm an old man with more than one academic degree. It occurred to me while watching this that in my youth we spent as much time and effort reaching places that offered learning, as we spent in the learning process itself. We had classrooms, libraries and publications.... period. These days I'm certain that anyone can reach the same level of education by having a laptop and never leaving their sofa.
I am also an old man, who never graduated high school. I did learn one thing while I was there, They don't teach you how to think, they only teach you how to memorize stuff and then regurgitate it on a multiple guess test. And you are exactly right I have learned most things on my own from the same books and publications you all read at University, and I have learned a great deal, I just don't have sheep skins hanging on my wall! That being said, being privy to that same knowledge I came to a different conclusion, Einstein was wrong. None of his theories adequately explain even the most simple natural phenomenon without resorting to enormous, pages long equations that practically no one can understand. Math is not science. Particle physics is dead. Nikolai Tesla had it right when he said: "Everything is fields and fields are not particles." Field theory explains all these things much more simply and Elegantly as Occams razor Illustrates. Thanks for reading to the end.
@@imnewtothistuff - Yes, Einstein, and Newton was, and is still wrong on the Gravity thing, as U said, "math is not science", physical science. There's physical evidence showing downward falling motion is caused from trapped gas molecules, and not Gravity.
You/ Tesla " particle physics is dead ." "Everything is field and field is not particle."
I don't know anything about the physics field theory, your help is needed !
Not an export, but I've tried to follow particles physics in motion, ATOMIC MOLECULAR MOTION, from atmospheric gases through the human body and deep within earth's core, and haven't found where particle physics of ATOMIC MOLECULAR motion is not needed, not even a ring the bell moment waking up one's mentality saying something is wrong, particle science is dead, and no longer needed.
Here's where You comes in.
Where's do a FIELD gets it's motion ?
Are the motion within our body and those of flames driven by ATOMIC MOLECULAR ENERGY FLOW or by FIELDS ?
Can FIELD energy be held in the palm of my hands ?
Darn right. Even when I was in college 20+ years ago it turned out the value of my degree was effectively 0. And I got several degrees in engineering. I had been sold on this lie that "continued education" i.e. college was SO important and valuable and all I did was waste 5 years with it.
@@imnewtothistuff You are evidence that there's still a need to teach people how to think, rather than just making knowledge available on the internet.
"short answers please." Krauss: "Oh, this reminds me of a wonderful story.."
Yeah, the one from the peak of the cold war from KGB headquarters.
I was very impressed with the questions. These kids are well versed in this esoteric subject matter and could express complex questions in a foreign language. Ukraine has a bright future.
My thought exactly. These were brilliant students any professor would wish for.
Really? I've never seen an audience more dreadful and apathetic than this one...
@@bisherimam9640 they can barely speak english
each time he give a lecture in the usa people ask him about god ? good to see these students have a grasp on theoretical physics. english may not be there first language but it's not for a lot of Americans either.
So happy to see him back. Love from Russia. :-)
From Russia with Love!
His book, The Physics of Star Trek, shows that he believes that America is an evil empire. But would he really want to become a red political officer?
This is an excellent lecture by Lawrence Krauss!
This is an excellent comment by Daniel Morris!
Thanks for putting it online.
Wow..so happy to see Lawrence stand for reason and peace. He took questions despite the government official trying to block them.
The girl was cute, but I bet she had a hypo of sleeping agent in her hand just in case any student became a little awkward in the questions!
Big Love to Lawrence Krauss. You are a Prophet of Wisdom among stars.
Mind blowing! Incredible! And you delivered in a way that non physicists like me can understand. Thank you Lawrence!
So happy for a new LK vid
@French Frys I'd let you borrow my hat for a while if I could. I'm not used to coming in second for the opportunity to set the record straight. But damn, nice one...
As I watch this fascinating lecture by Dr. Krauss and the subsequent Q&A session in May 2023, my heart aches. This was an event in Kyiv; a little more than three years before Putin's criminal invasion of Ukraine. The students at this lecture were so well-spoken, so thoughtful, and so eager to learn. It disgusts me that their lives have been so damaged by this monster. If any American doubts that we should provide the maximum support for Ukraine's defense, they should watch the Q&A session. The students of Kyiv will change your mind.
So good to see Lawrence Krauss again! More please...
Gratitude and regards to Lawrence from Southampton UK.
So glad to see Mr Krauss back on stage, wonderful teacher and he changed the way i think about the universe. Thanks.
An aplause to the engeneers they deserve more space that most physics.
Congratulations for the excellent coverage!
with out all the past physics i would not be here for sure so they deserve all an aplause.
Another fine lecture by Prof. Krauss I'd never seen before and I learned something new, that gold is made in the collision of neutron stars. I was struck by the standard of the questions by Russian people, I think they were among the best I've heard. For me, science is the spice of life.
That was the most chaotic Q&A I've ever seen. Could they let those students ask their questions without rushing them?
Lawrence Krauss' talks are always amazing.
Good disguise, but the intellect and enthusiasm gave you away.
I think I spelt it right. He is very well read and certainly has more abilty than most of us so I cannot see what is wrong with the comment. Have you veiwed his other discussions?
Gun-slinging genius like John Wayne, Billy the Kid. oh! Don't forget Lawrence Krauss.
👏👏👏
@@manuelmagro9173 He actually reminds me of a crossover between a young David Hilbert and a young Kurt Goedel. That hat.
cue the spaghetti western music - Ennio Morricone?
BRAVO!! Let's hear it for us large-brainers... and for Lawrence Krauss for sharing such elegant things with us so eloquently. BRAVO!!
Excellent presentation and very honest answers for a future generation of not only scientists but human beings!
... a slightly manic romp through the Big Bang and some of it's effects - but the enthusiasm of the audience and the quest for knowledge was really refreshing! Thanks for posting!
Interested I draw and been drawn the same symbol as you had on the screen. Wow you so clever
I glad people like you are born
So happy about this lecture and so upset about these f.... stupid unrelated comments . Lawrence is great propagator of reason .
Lol. Hope that wasnt mine. He is a hero ;)
upset about what ?, some letters written by a noname.
You should not be affected by random thoughts.
There is no-wrong answers, Because 'MAN' little G*D's can do everything & anything over time, that's why there is no-wrong answers.
Matt Magic
Yeah I also got tired of hearing about Stephen Hawking's irrational fear of aliens over the years. The probability of another civilization being active right now in the galaxy is probably infinitesimal, and why the fuck would they fly spaceships for hundreds of years just to harass our tiny planet, even if we did make contact through SETI. It's absurd.
Love his lectures. This one is my most admirered...so much energy, so much intelligence of audience. L.k. has a Very god brain. Good comedian too. Makes physics easier than taking a coffee physic. One correction though....my italian aunt made the universe when she forgot that her pasta fazzoli soup was cooking on too hot of a flame and pasta exploded across the universe. The movie of this event is in production right now. Prof. Krauss wrote the screenplay.
i like the new and improved look. fits the personality. great lecture. thanks
AWESOME I'm glad you're back Lawrence.
"Metoo"
Bad joke lol... really, I'm glad you're back though you'll have to fill in for Neil now until he's back because... we all know he will be back.
"Governments don't lead, they follow." Thank you, Dr. Krauss.
Thank you Lawrence for another awesome lecture, loved it. Only thing I can contribute is 28:50 is not New York bro, it's Chicago. Other than that, perfect.
Great to see Prof. Lawrence Krauss again active, this time in Europe.
I love his enthusiasm in answering the students.
Greetings from Hungary. BIG thanks for sharing!
Very exciting. But most important is Q&A at 1:14:30!!! It should be shouted out loudly in every tv news show on the whole world. It's two minutes before twelve!!!
This is a great dramatic possibility to take space and time and answer, in an infectious way, what is true moviment for us.
Absolutely awe-inspiring stuff.
there are billions of this theist kind. he listens with his mouth. 100% determined at all costs to never understand
Wow, he sure is a great lecturer!
Thank you so much for this upload. Amazing to here Krauss’s lecture.
I want him to explain why my cat won’t eat his Benevo vegan cat food. He caught a mole and a mouse and was giving me the evil eye. I had to make sure he gets his fancy feast. But, like, the vegan food had all the minerals he needed to be nourished.
he has a new approach to lecture? i like it...' very generous more than persuasive
This is my favorite krauss presentation
Love listening to Krauss and this video was excellent, thank you!
Excellent closing
Welcome back, Lawrence!
A digital clock can display numbers based on how many times a crystal vibrates, but it doesn't measure actual time...just counts crystal vibrations. Clocks and other timekeeping devices are the tools we use to measure time. They work by making consistent and accurate counts of specific physical phenomena, such as the oscillations of a quartz crystal, the vibrations of a pendulum, or the decay of radioactive elements. These phenomena are used as references to mark the passage of time, but they are not time itself. In physics, time is considered a dimension that, like space, is affected by gravity and other fundamental forces. The concept of time is still being studied and debated by scientists, with different theories about its nature and properties.
Thank you for the video. In this video, you mentioned that two black holes combined and released lots of energy.
Question: Where does this energy go? Does it replenish sun’s dissipated/ radiated energy?
No, stars are not replenished. It is this energy that makes gravitational waves, and is propagated through the universe as gravitational waves, for billions of years.
if somthing in space sounds imposible to me, matter just dont call any matter, matter has intimal call to some matter not just any matter, like the planets they belong mercury with neptune, venus with uranus, earth with saturn and yes marswith mercury making 4 pairs one positive, one negative each one making a union for making an entangled planetary sistem
a power stroke has its limits so any thing that is hot, it spreads arround its system if so as novaes in the skie, they are beating electric herts of the sky.
To those of you thinking the audience is unresponsive. Remember this is the Ukraine, not the USA or England. I have seen other lectures there.
They are just quieter and not as demonstrative. It's a different culture, folks. I am amazed at the number of people in the Ukraine who, at least, understand English. In the USA people have been detained by the police for speaking a language other than English. One foreign student, who didn't understand a cop screaming for him to get on the ground was shot and killed. Here in Texas, it's not so bad, as we have many Spanish speakers. Texas was once a Mexican state.
1:04:29 what does he mean with „we can create the type of energy that makes space collapse.“
is it maybe radiation, tnt or watever but space till now it restrure its self, with the push of all it mends it self.
In the U. S., students know when Lawrence Krauss is attempting to add a little humor into his lecture. Foreign students never laugh. They miss it.
In mathematics, a zero-dimensional topological space (or zero-dimensional space) is a topological space that has zero dimension with respect to one of several inequivalent concepts that assign dimensions to a given topological space. The graphical representation of a zero-dimensional space is a point.
Fantastic stuff, food for the brain..
I have a question here. So at 22:22, Krauss says that a 36 solar mass black hole merged with a 29 solar mass black hole to produce a 62 solar mass black hole and 3 solar masses of gravitational radiation. I understand that the entropy and the information contained within a black hole is in proportion to its surface area. So 4*pi*r^2 means that 62 solar mass black hole has 1.799 times the combined surface areas of the 2 black holes that merged to form it. That means it has 1.799 times as much information........ well I keep hearing these "physics for laymen" lectures say that information is conserved, that it can't be destroyed, and that because the laws of quantum mechanics are time reversible, it can't be created either. But there's 1.799 times as much information after the merger as before, and that's just in the resulting black hole, that's not even counting the information carried off by the gravitational radiation. Does this not disprove the claim that information is preserved? It nearly doubled, or possibly more than doubled, but at least multiplied by 1.799, a massive amount of information.
Am I the only one to notice this inconsistency?
That guy who keeps trying to interfere peoples questions is so annoying - just leave them alone man! 😂
Excuse me, what is your affiliation, blood group and bank number?
George Grigalashvili i felt the same way!.
Yeah, what a savage!
My house is about 1/2 a mile from the one in Louisiana. I swear I can hear it humming some nights. Crazy...
It's great to see that science is becoming a common language between nations.
Always beeing, in the bad and the good anfortunaly. or may be the way it should be?
I bow to Krauss. He has surpassed The Tyson in promoting scientific culture with this just ONE VIDEO.
1:09:22 blonde girl came to mock, only to be humbled, by how Lawrence took her seriously and gave answers in most humble manner.
The answer to the gauge group of general relativity is that it depends on formalism. In standard formalism it's the diffeomorphism group and in the vielbein formalism it's local lorentz group.
What is wrong with this audience? Is this a cultural thing in Ukraine to be extremely dull and quiet during an enthralling lecture on one of the most remarkable achievements of mankind in recent times. Even semi-science literate audiences in the west would be transfixed let alone university science students. Kudos to Professor Krauss for breaking it down with such eloquence.
O the next forty years will be exciting! Survival in the most basic of ways, with these little nuggets of far away things tucked away, transformed into stories and myths once again.
Great to see inquisitive students asking questions...however simple or unanswerable..To find answers, thats science!!
love the subject even iam not a mathmagic dude.
not allways right.
I'm in Cali buzzed and Krauss is great presenter.
At one point he says essentially that the two black holes reacted to form one black hole with slightly less mass than the original and also a bunch of gravity waves. So, my question is how can that energy be recovered?
I also want to know how prevalent those gravity waves are and how energetic are they. Is there enough energy being conveyed through local spacetime by a "background noise" of gravity waves to act as a power source?
I'm talking about a solar panel that is built to collect power from the blackhole sun...
@@emrysmcwryn7902 as i see a power stroke has its limits(its heat) so are the black holes.
@@espaciohexadimencional6798 will you elaborate?
@@emrysmcwryn7902 i dont understand what you are asking me: will I elabotate what? sorry I dont get it.
Scientists are the ultimate Rock stars. Lawrence Rocks.
Why don’t I see excitement in those students and laughter at the occasional jokes? It’s Lawrence FREAKIN’ Krauss who’s talking!
In my opinion many more of these events are to be recorded before we can be reasonably sure these events are caused by gravitational waves.
aske a doctor and are the same as a pulsing heart, why not the pulse of beating electric energetic out side universe that joins with as as so many others around?
Is it possible to do a replica of the big bang?
Faster than lights rate of induction. Travel along the edge of the coaxial circuit of the Inertial plane, like the electron vortex along a wire.
Gravity is centripetal acceleration of incoherent matter into the Inertial plane.
Magnetism is centripetal acceleration of coherent matter into the Inertial plane.
that reverb is beautiful
Damn outstanding! I like this guy!
does all of the matter that a black hole has consumed get radiated before it evaporates?
Really interesting but i will watch it after my exam
2 neutron stars colliding give an intrinsic reaction, 2 black holes colliding give an extrinsic reaction both propergate G waves and a black hole actively consuming a star doesn't generate any G waves nor even upon discharge or when t=0. approches
Thanks for sharing the lecture.
I think vacumes is relative to the space we are near sun draws in vacumes maybe .So farthest point maybe pressures
In the same way production follows the design and engineering of a product.
Curious to know how often the theoretical leads the experimental, or vice versa, and what determines which leads.
What would cause a star to collapse? Gravity? And if space is moving away from us at the speed of light how can we ever claim to have found the outer edge, ie: the big bang?
Yeah he mis spoke a few times
that things dont happens they all are same charge eather positive or negative in respective side so no way to collapse.
as a star loses its outer fuel the central gravity can not contain its outer core it then enters red giant state. we can see that happening now with the star beetlejuice wich was a yellow sun like our own. as the weakens the gravitational pull becomes so great it collapses in on itself becoming a black hole or a neutron star depending on its mass.
we can only see the edge of our visible universe, that isnt to say the universe goes on for ever or that it ends there. the answer is dont know.
28:00
but how can the gravity wave detectors discern the direction the collision came from?
Because there are three of them. Good old triangulation performed on top of a spherical planet.
More or less it's the same process as figuring out the source of a sound by hearing it. With only one ear u couldn't figure out, but with 2 ears you can because the sound wave gets first one ear and after a very short amount of time then gets the other, and your brain does the calcullation automatically.
So the key here is to have more than one detector. They were able to locate the neutron's star collision in the sky because that collision was detected by three detectors, the 2 from LIGO in EEUU and the detector Virgo in Pisa (Italy). More detectors u have, more precise u can locate the source.
I have been wondering about the gravitational waves as cause for the Kolisko Effect. Has anybody followed that investigative direction ?
If it sells, why not use it?
@@schmetterling4477 I see you learned a new sentence today !
@@TruthWielders For you only the best.
What is the medium the "wave" moves through?
Spacetime. The same that all other waves are moving trough.
How far is that black hole (neutron star) from us? Thank you.
"Every atom in your body came from a star that burst. And, the atoms in the left hand probably came from a different star than your right hand. It's really the most poetic thing I know about physics: they're all stardust. You could not be here if stars had not exploded, because the elements - carbon, nitrogen, oxygen, iron, all the things that matter for evolution - were not created at the beginning of time. They were created in the nuclear furnaces of stars and the only way for them to end up in your body is if those stars were kind enough to explode. So forget about Jesus. The stars died so they could be here today. " Lawrence Krauss, 2009
light is every were and some how it contains all the info of all, all is light.
What about earth tremors? Would they show up as gravitational waves?
Why no explosion of dynamic proportions when one black hole collides with another if the material is as dense as is thought?
Ok, so when two black holes merge, the mass of the new black hole is less than the mass of the two initial block holes. The difference in mass has been converted into gravitational waves. What I don't understand is precisely *what* within the black holes has been converted to gravitational waves? Is it protons, neutrons, photons, or what? For example, if it is electons that are converted, then does this mean the total number of electrons after the merger is less that the total number before? If so, what is the mechanism by which the particles are converted? And if instead of two black holes colliding it was two massive stars, would we still get gravitational waves? Would the merged stars also be less massive than the two initial stars? Would the stars also have lost some particles as they are converted to gravitational waves? Again, what is the mechanism by which the particles get converted?
Oh oh. A pseudo-intellectual.
@@biggstavros5876 A layperson asking relevant questions is an intellectual, not a pseudo-intellectual.
As for the questions, one of them is answered in the talk. Lawrence mentions waving your arms around technically creates gravitational waves (effectively indiscernible, but still), so the same is certainly true about stars colliding. He also specifically mentions that stars colliding would not create strong enough gravitational waves for us to currently detect.
It's not that "particles are converted", that is not the fundamental ones. Most of the "mass" of a proton or neutron for example is really in the form of energy, the gluons that hold (=work/energy) the quarks together to make the proton or neutron, over 90% in fact. That is, more than 90% of an atom's mass is already energy (m=e/c^2) that we perceive as mass! Smash it to bits and presto, lots of quarks and HEAPS of unemployed energy, a portion of which bends space/time (energy curves space/time) in a shuddering way that seems wave like.
Hi Eyles. Yes - any movement of any mass creates gravitational waves. The G waves we have observed so far, appear to emanate from Neutron stars colliding. The mediators of the waves are called 'gravitons', though the theory is incomplete in the description of the process. See, for instance: en.wikipedia.org/wiki/Graviton
I had a couple of other thoughts to try to make it clearer. If you wave your arm, you are creating G waves - but they are so incredibly small and weak, we cannot (yet!) detect them. A Gravity wave is a disturbance in the spacetime continuum and those we have detected are still extremely small due to distance, but the masses have been great, and the energy to throw the mass around was truly enormous, affecting the spacetime like a large pebble thrown in a pond. Hope this helps :0)
so where does the gravitational wave energy from all the black hole 🕳 🕳 collisions during the lifetime of universe went? Dont tell me beyond the observable universe because from there other waves 🌊 must come in too. Why dont we observe roaring noise of gravitational waves background?
How do you want to observe gravitational noise? What would you expect to measure if there was one? Keep in mind noise smooths the amplitude, so noise is something that makes it harder to detect an event, as opposed to being something detectable in itself. I suppose as we increase resolution of gravitational wave detectors, we will see more and more collisions further and further away, then we will start to observe not just collisions but super massive objects moving, then less and less massive objects further and further away, and only then we might see a background noise.
Kajko Kokosz same like any kind of noise and same as gravitational signal. observe its waveform on the detector. noise doesnt smooth amplitude of anything. its additive. I think your statement is false. I think You are incorrectly claiming that noise is undetectable.
@@charlieangkor8649 I didn't say noise is undetectable, just that you need much higher resolution for that. I'm not an expert, so I don't know if at our current technology, placing lasers across the Solar System would be enough, maybe. There's another problem: how do you differentiate gravitational noise from measurement error noise?
As for the amplitude - draw a sinusoide. Now add 2 to all of it - it's still the same sinusoide, just with an offset. Sure, if you have something like a black hole collision, you have a spike. If you have something less significant, happening 10 times a second, you have a lot of microspikes. This is what I described as more and more things becoming visible as you increase the resolution. But the way I understand your initial proposal is that random events would sometime produce many microwaves in the same moment that would cause an (constructive) interference, which outcome is such a strong wave, that is now picked by the detector. Problem is, waves will interfere this way half of the time, and another half of the time it will be a destructive interference, where they cancel each-other out. If you look at a distribution curve, as you increase the number of samples, the curve becomes more and more smooth, because the statistical error decreases. So the more sources of gravitational waves, the smoother the curve, and as every little piece of mass is a source of gravitational waves, I would expect, perhaps wrongly, that therefore gravitational noise is too smooth to be detected with any technology conceivable today.
It's the standing still that gets you to the speed of light .The thing is spreading out from our point of view so every thing is spreading out.
So finding the point of starting walking towards it would be a quantum to reseed the time of light that's bending space at zero energies
What causes the gravitational wave, is it like a photon? Or is it a ripple in the Higgs field? I guess what Einstein said “there is no gravity, it is curved space-time” since time is not a fabric and not an object, it’s just a comparison of relative movements, it’s finally showing to be wrong? I noticed the explanation said space itself is waving, so I assume that atoms and molecules are shrinking and expanding in one direction? This explanation leaves out time, as I think it should. I always thought space-time fabric was a fabrication anyway! We should be able to replicate gravitational waves by using some extremely heavy heavy weights smashing together very close to the detectors. If that doesn’t work, I would say our understanding of gravitational waves is wrong.
water has 3 states and water is comparable with electricity, then light waves on its own its hot and cold and were you see this 2 there is a meadle one made by theme and were this three are they make a 4th (the system).
What cosmologists have miss to take in acount are the 7 wave lenght steps since they found them and almost keep them in asecret cause of all the videos I have seen( many) no body speaks, exept for one hes name was ALTON HARP in the video ALTON HARP INTRINSIC RED SHIEFT, Ifound this video in YOU TUBE in THE EU,this video helped me to solve many cuestions, it seems it does not tell you a lot but 7 steps in wave length tells you a lot:
It tells that Einstein is wrong wene he says that light blue and violet are havier than WHITE in the video LIGHT AND DARK 1 OF 2 - LIGHT directed by JIM AL- KHALILI. almost at the beggening he says that back in the erliest times of physics came out the ULTAVIOLET CATASTROPHY that led EINSTAIN to the conclusion that violet and blue were havier than the rest of the other lights by those times.The next might change this point of vew : wene you start to pedle the first light that comes on is red, folowing orange, yellow then white to stay in the most in it with an exeption that a bit of yellow kind of appears(wene the fastes at pedling. the reason to me is another and goes like this : at the beganing of pedling the dinamo starts to absorb the red masses that are the outer orbits that the dinamos magnetics open(amplified) territory, by absorbing red violet is out, then comes orange and blue is gone, time for yellow and green is vanished then comes white in the most cause a bit of yellow apears trying to fill space with the push of white that tryes to fill the empty space matter absorbed by the dinamo. This same exemple shows that even the small solar systems(atoms) behave or work the same as the big systems(DNA, STARS, GALAXIES ETC).
With it i sugest that the universe matter is areinged as a rainbow, that matter follows such order since each element has its own color and vise verce. so I can say that the universe temperature is not about the same cause is beeing demontrated that each color has diferent temperatures, density, wave lenght as well is clear to me diferent light speed caused by the density of each color.
From electron to proton the mass difference is huge. This is a kind of multiverse theory where the parameters could be a little different and so many other big bang and universes.
Lecture single and greatly explained
love this guy
Yaaaay......a new Lawrence Krauss video! I hope he's back for good. I just noticed this lecture was in Ukraine. .....so I guess he's not "back" yet. lol
How do we know that the detected gravitational wave event wasn't an earth-based, brief, plate tectonic slip that was located half way between the two sites? EDIT, I wish he had said a seismic event looks like this and not like that, therefore we can rule that out.
Thanx for uploading:)
"No device can produce sum useful energy in excess of the total energy put into constructing it. Time taken to stock energy required to build an energy-producing device of useful work added to the time building the device, will always be longer than the entire useful lifetime of the device" (The Fifth Law).