Gravitational Waves Explained | Barry Barish and Lex Fridman

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Lex Fridman Podcast full episode: • Barry Barish: Gravitat...
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Barry Barish is a theoretical physicist at Caltech and the winner of the Nobel Prize in Physics.
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Опубликовано:

29 сен 2024

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Комментарии : 98

@markwiebner7806 3 года назад

4 dimensions hurt my head a bit, but I get the dimension of time. How do you measure a thousand times smaller than a proton? This is great stuff. Thanks Lex! As a MS science teacher of 25 years I always look for inspirational content. You never disappoint! Thanks for being so authentic!

@JJs_playground 3 года назад

That's why LIGO (and VIRGO) had to be 4km long (in each direction) to be able to detect two black holes colliding into each other.

@tachiroakisu5128 3 года назад

I am henceforth going to refer to all errors in my code as "infinities".

@tristand3928 3 года назад

Any Schwarzschild books?

@mitchgriffin2611 Год назад

New comment

@slappyhappy6192 3 года назад

We just ride the way like a ship in a tsunami

@immortaljanus 3 года назад

Lex looks genuienly disturbed... :D

@adelinaquijano1083 Год назад

she ask me something I said I talk later

@thomasedward2231 3 года назад

“Are we supposed to be ok with that?” - legend

@puertorican850 3 года назад

Fascinating

@JakeRoque 3 года назад

So cool to get to learn things like this. Thanks Lex.

@justinroca932 3 года назад

I don't consider myself a stupid person, but this is so far beyond me it's just Incredible

@Randsurfer 3 года назад

It's not beyond you. This guy said nothing. and there was no explanation of gravitational waves.

@justinroca932 3 года назад

@@Randsurfer well thanks, that makes me feel a bit better about it ;)

@Randsurfer 3 года назад

@@gar50172 It is not just that it is a theory. The problem is that the phenomenon is so vaguely and poorly defined. Even if you believed the theory, it wouldn't tell you much.

@Randsurfer 3 года назад

@@gar50172 So, the title of the video "Gravity waves explained" is quite silly.

@CraneArmy 3 года назад

the bowling ball on the trampoline analogy never seemed like a good analogy for gravity.

@Randsurfer 3 года назад

Correct. And that is a good indicator that nobody still knows what gravity is or how it manifests itself in nature.

@alohadave13 3 года назад

I really enjoy video podcasts that strain the brain to ponder extremely complicated concepts. WOW!

@voice_cope_art Год назад

@15:36 I don't know why Barry doesn't understand this question...if you're closer to the source, the amplitude of the gravitational wave gets larger, so the effect gets stronger and if you get close enough you get ripped apart

@captain26 3 года назад

16:26 - 17:00 This is EXACTLY how I feel when I learn new physics stuff. Existential crisis, followed by, "And we're suppose to be ok with this?!?!"

@Chemical_Truth 3 года назад

If space-time can bend, what medium does it bend into? Space-time is 4 dimensions, so we need a fifth dimension that it can bend into? The 2D surface of a trampoline can only bend because it exists in 3D. Also, if gravity is a wave, even if it's very tiny, you can use resonance to amplify it?

@thepoopman9951 3 года назад

What a conveniently placed monster can

@michaelcoulter714 3 года назад

What a truly brilliant man. The fact that he can explain this phenomenon in a way even I can understand says it all. Great interview.

@truthstarved 3 года назад

Very interesting guest; thanks Lex

@channelrafy 3 года назад

I need a cigarette after this, and I don't even smoke

@Randsurfer 3 года назад

The Earth and a bowling are attracted to each other by a Force called Gravity. That Force is in the form of waves. Did this guy do anything to make you understand that? I suggest he does not know it and thus cannot explain it.

@Randsurfer 3 года назад

@@gar50172 Thus my objection to the title of this video. Nothing was "explained".

@AlphaFoxDelta 3 года назад

Lex, you are a national treasure.

@soulfuzz368 3 года назад

One of the best in a long time, well done

@97ciaociaociao 3 года назад

You know that a podcast is ahead pf the curve when the clips are 27 minutes long

@ltzhk 3 года назад

Lex, great interview and great work. I have a question in mind that I feel was not adressed. How can space time distortion induced by gravitational waves be measured or experienced from within that same distorted space time frame of reference? Doesn't the interferometer, or any other meaurement device, become distorted itself?

@JimElford 3 года назад

The ripple disrupts/distorts the path of the beam asymmetrically.

@razvancont 3 года назад

I believe he said the ripples are very small so they had to use light, which is a super “light” particle that could actually be distorted by the waves. If it would impact the actual device, they wouldn’t need to use light at all to detect gravitational waves, just look at it.

@razvancont 3 года назад

Or I might be super wrong and I have to watch this again 😂

@deanazcoolzi4382 3 года назад

**404*(( i can't do math or type.. yet here I am doing math and typing..... something must be wrong.///

@greedowins Год назад

How is energy conserved if the power of the wave is proportional to distance, but the area of the wave is proportional to distance squared?!?

@Docchucklilchuck 3 года назад

Force of Gravity expressing itself in the shape of a wave.

@jaixzz 9 месяцев назад

Trampoline doesn't 'make me feel any better' either... It's a failed analogy...

@DSAK55 3 года назад

They're dealing with 10^-18 meters, 40% of Americans are take horse dewormer

@grygoriymelnyk4533 3 года назад

Einstein made some assumptions based on insight, and, at the same time, did not "believe" in the invention of accurate measurements.

@roymillsjnr5172 3 года назад

light bulb moment thankyou eureka👍

@Randsurfer 3 года назад

What did you learn? I have no further understanding of Gravity having listened to this for 27 minutes. This is an honest question, what was the light bulb moment?

@adelinaquijano1083 Год назад

I think we talking how to pay my loan and he said after full paying what you feel I said I'm happy

@mikeJohnson2222 2 года назад

The question is... If space is a "medium", then what is it made of?

@adelinaquijano1083 Год назад

he Google and he said long rain I said cancel because too much muddy there

@davidbess796 3 года назад

10 to the minus 21…also know as a ‘cunthair’ my good man

@alpineflauge909 3 года назад

amazing, thank you.

@abhijeetptl5 3 года назад

Definitely going to re-watch this multiple times.

@samhagen8924 3 года назад

Flat earthers have entered the chat

@ganderstein3426 Год назад

Albert's ego seemed hyper sensitive.

@adelinaquijano1083 Год назад

yeah that's why I'm happy deleted my personal

@AdjacentDoor 3 года назад

Just lovely!

@JakesOnline 3 года назад

Here's an easy way to understand it. If the Sun disappeared, we would continue to see sunlight for 8 minutes. We would also remain in the Sun's orbit for 8 minutes because gravitational waves travel at the speed of light.

@philproffitt8363 3 года назад

Yes...changes in the warping/distortions of 'space' travel at light speed.

@ericf9479 3 года назад

Einstein be like " gravity got w a v e s "

@dustinoneil7874 3 года назад

Finally I can tell Lex in this conversation feels exactly like me with most of these conversations, doesn’t have a clue what Barry is talking about!!!

@adelinaquijano1083 Год назад

I always told my team be humble.

@johnterry6541 2 года назад

A little awkward type of questioning but important ones. Great examples by the guest.

@shadym1lkman 3 года назад

The trampoline example of fundamentally incoherent.. it's misleading at best.

@peterkiedron8949 6 месяцев назад

Why mass bends the space? Einstein had no explanation just like Newton had no explanation for attraction.

@user-tj5yg5pk8v 3 года назад

The typical model of objects that have mass distorting space-time is a flawed visualization. It looks like a funnel. Objects that have mass distort space-time all around it not just in one direction. A sphere of influence of mass on space time. 19:45 yeah Lex! Exactly! Is there an accurate model for this? If not can someone please make one?

@christophermichael918 2 года назад

Amazing! Ty so much (ripples in the pond are also referred to as interference patterns for anyone who isn't familiar)

@adelinaquijano1083 Год назад

Nathan rosen

@nicky-pn3pj 3 года назад

No shit

@user-tj5yg5pk8v 3 года назад

Do you think we experience the distortions in space time, or would we not notice? He answers the question in the video ;)

@johnmartin650 3 года назад

Lex is no where near as smart as he thinks he is. He's also way less humble than he pretends to be. Seems like a very spoiled kid talking to daddy's friends.

@levous2 3 года назад

“Newton described what gravity does but not why…” 30 minutes of fascinating Physics history and further advancement describing what gravity does. But still, no why. So space time distorts and gravity has waves but why does that create an attractive force between massive objects? Why? WWWHHHYYYY?! The bowling ball analogy uses gravity to describe gravity. The marble moves because the trampoline surface becomes a decline and gravity moves the marble down the declines plane. In space the marble would not move.

@jrmex80 3 года назад

Because it’s nonsense!!!!!!!!!

@MilkShake 3 года назад

Is this jehova from ellementry school?

@paulmitchell5349 3 года назад

The analogy of the bowling ball on a trampoline disappears if we replace the trampoline with a rigid surface. What does elasticity have to do with ''empty'' space ? Space is stiff because it allows the passage of waves ?

@philproffitt8363 3 года назад

It seems there is no "empty space". Space is a 'something' that is yet to be determined. We observe space as seemingly frictionless when we send objects into orbit...but I'm guessing he says space is 'stiff' because a gravity wave (which is just a travelling distortion of 'space') finds it a heavy-going medium. It travels at light speed but its amplitude and power are greatly reduced...perhaps (just my thoughts).

@paulmitchell5349 3 года назад

Space is stiff ? Isn't it more accurate to say that space allows energy to be transmitted through it ? Detection of a gravity wave still doesn't define what gravity is .

@razvancont 3 года назад

I think he describes it as waves created by objects spinning in 3 dimensional space, not like a pendulum, for example. Accounting also the time, it’s actually 4 dimensional. Exactly like planets spin around the Sun.

@KingBiski138 3 года назад

Laughs in density

@nicky-pn3pj 3 года назад

🙈🙉🙊

@nicky-pn3pj 3 года назад

Nope autum.

@JakesOnline 3 года назад

So Einstein plagiarized Robertson? 9:30

@DeanWolf1965 3 года назад

Wow,…so cool.

@joeyg29jgjg 3 года назад

Fricken yes.

@Jamsheed1991 3 года назад

Wow

@justlikeyouful 3 года назад

Lex, human intelligence is a musical instrument. Every note up a down the spectrum has not only merit but is essential.

@Randsurfer 3 года назад

The reason why physicists dance around the subject of Gravity, and speak obliquely for 30 minutes like in this video, is because the top scientists still do not understand the basics of what Gravity physically is.

@prithvib8662 3 года назад

Could it have more to do with the fact that this is a podcast for a mainstream audience so delving too deep into the details would lose people?

@Randsurfer 3 года назад

@@prithvib8662 No. He could have given a simple general explanation. There is NO explanation of what is the nature of gravity waves and how waves traveling between objects create an attractive Force. He cannot explain it because he does not know.

@prithvib8662 3 года назад

@@Randsurfer What do you mean by "the nature of gravity waves"?

@Randsurfer 3 года назад

@@prithvib8662 What a gravity waves is, physically. What is the medium through which a gravity wave travels? How does an object with mass continuously produce gravity waves? Are two objects required for gravity waves to be produced? All these questions give answers to the question: What is the nature of gravity waves. None of these questions were answered by this speaker.

@prithvib8662 3 года назад

@@Randsurfer well, try answering these questions about water waves. Water waves move through the medium of...water itself. Gravity moves through space time. Etc.

@nicky-pn3pj 3 года назад

Seasons.

@jimbo5276 3 года назад

Winter? Fall? Summer? Spring?

@jimbo5276 3 года назад

Years

@jimbo5276 3 года назад

Days, months

@jimbo5276 3 года назад

Incoherent non sequitur youtube comments?

@Dan.50 3 года назад

Black Holes affect you and I in absolutely NO way whatsoever. Though I do know that they keep physicists working...

@philproffitt8363 3 года назад

The gravity waves from them DO affect us. They squeeze and stretch us as they pass through us. The effect is too small to cause any perceivable difference to your daily life.