Professor Gauntlett gave the lectures for the General Relativity module for our physics course. Despite having learnt all this already, I still find myself sitting down and listening to him speak about physics! Easily one of the best, articulate and well-prepared lecturers I've ever come across!

Okay so iam a middle schooler and i want to study physics. I love to hear more about physics and life. This was the best lesson ever . I love this lesson.

@TheQuallsing

2 жыл бұрын

P

@bertrandpetyt3330

2 жыл бұрын

1¹1111¹¹111111111111¹11111111111111¹1¹11¹1111111111111111111111111111111111¹11¹111111¹1111111¹1111111¹¹1¹¹1¹¹1¹¹11111111¹1¹111¹11111111¹¹111111111¹11111¹¹111¹¹¹¹1¹¹111¹1¹¹1111¹11111¹¹11111¹111¹1¹1111111111111111111111111¹1¹¹1¹11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111¹11¹1111111111111111111111111¹111111111111111111111111111111111111111111111111111111111¹11111111111111111111111111111111111111111

@whirledpeas3477

2 жыл бұрын

Middle schooler, 🤣

@yfusion9139

2 жыл бұрын

Not alone.....

@dormantrabbits

2 жыл бұрын

Keep learning. Maybe we'll be watching your lecture on this channel one day

Literally, who would dislike a free University Lecture?! much less 600 people. wow

This guy is a phenomenal teacher. This is the first time I have heard that the singularity inside a black hole is a singularity in time. He made the entire subject approachable and understandable to someone with little math and physics education.

@Bobby-fj8mk

Жыл бұрын

I have my own theory that there is no such thing as a singularity. I think Black Holes are just giant neutron stars. They are full of neutrons and they can't collapse because time stands still. Without time - nothing can happen.

@TheDavidlloydjones

Жыл бұрын

@@Bobby-fj8mk One would think that a person with such an interesting and important theory would sign their name and address to the revelation, so that the world's press could get in touch with them, to find out the details and the implications. Bobby?

@Bobby-fj8mk

Жыл бұрын

@@TheDavidlloydjones - who - me?

I never would have had any understanding of what Hawking Radiation is had I not listened to this talk. Just one of many great nuggets free for the asking!

Thank you so much for delineating these subjects and putting these in laymen's terms, enabling EVERYONE to grasp and understand

That the LIGO detectors can even be built at all is amazing. That they actually work is even more amazing!

One of the best lectures about black holes. Even though it is one of the toughest and mysterious stuff in physics, he did explain it in a very simple way. Thank you Professor for such a wonderful lecture.

i truly do not believe that anyone on the planet could take that lecture better than him......even though I'm off field here(dentist😅) i tend to have an interest in the topic and almost all of the lecture gave me an insight to what answers I've been looking for years .....hats off professor Jerome!!

A brilliant and concise lecture. Thank you for sharing it.

I know absolutely nothing about physics but I just recently started learning about black holes and now I’m hooked. Found this lecture and while this is definitely not my area of educational knowledge, I love how he explained things throughout. Made me feel a bit smarter after watching :)

Just come across of this channel on you tube, so grateful I found it, incredible incredible lecture and all of them I listened so far very unique. Public is dying for such knowledge and information, its so important for us to know about our Universe and us. Thank you for sharing it with us.

Great talk, I learned a bit about hawking radiation, the tuesday analogy and essentially what the next big projects in cosmology might be. You get a glimpse of how things in science/physics are connected, the theories, how Newton wasn't invalidated but rather being a puzzle piece the next generation built upon. Then having relativity and quantum in parallel until we have more knowledge for the next theory. Then there are observations or experiments which are made by essentially spending money on detectors and accelerators. And with more advanced theories we as consumers get more powerful tools, spaceships, GPS, smartphones, that's the engineering benefit of it.

This was excellent. Thank you for offering it to us!

Such a deep, clear, concise and simple to understand explanation. Fascinating.

What a fantastic speaker, so clear, so detailed, talk so well constructed, thank you for uploading

@commentingpausedtoprotectus

4 жыл бұрын

@@calvinames8528 ok

@Garacha222

4 жыл бұрын

@@calvinames8528 am looking forward to your 1+ hour presentation

@booklover3959

4 жыл бұрын

@@calvinames8528 Yes Moose....but the psychological vacuum created by the material density of the conception in the Neoplatonic sense warps the physical dimension in accord with the ideal construction in the higher domain which renders any human measurement mute. Therefore the conceptual web of the human organism is tied down to a constraint of time and the associated curvature of this complex. Once this ideal realm is created it is perfectly possible for the human mind to get sucked into the vortex of its own creation, a type of a black hole. Therefore the ideal realm becomes reality. Or in other words, if you call a bagel sandwich a pizza then it taste like a pizza because it is now a pizza.

@jackkessler9876

4 жыл бұрын

@@booklover3959 Shit! That is EXACTLY what I was gonna say!

@YoutubSUCKZ

4 жыл бұрын

@@calvinames8528 who the fock are you

Fascinating talk, really brilliant new insights!

Just happened upon these lectures. Thank you for making them available to the public. Mr. Gauntletts presentation was incredibly good. Makes me wish I paid more attention in college.

@jameskeith7608

4 жыл бұрын

pourquoi?

Found this in 2020. And since this lecture "we" have also obtained a photograph of a black hole.

@governmentcheese411

4 жыл бұрын

sorry but no... we did not obtain a picture of a black hole. we obtained a picture of the gases and material orbiting a black hole. NOT the actual hole itself. it is literally impossible to photograph a black hole in anyway other than images of it's surroundings. because a black hole doesn't itself emit anything we can photograph.

@governmentcheese411

4 жыл бұрын

@Nemesis um... no armchair science please. magnetism, lol.... um.... no. and yes, time does exist and thus there is also space. and yes, they are relative.... because EVERYTHING is relative. literally.... EVERYTHING. hence the term.... "relativity". welcome to life in a 3 dimensional reality. but just for laughs... what do you call the "space" between two objects?

@frankblack1185

4 жыл бұрын

@Nemesis It is reletive only to those who measure it outside the black hole. Inside the black hole past, present and future probably exist in a higher dimension all together at the same one instant. Similar to The Nexus off star trek.

@ZeHoSmusician

4 жыл бұрын

@Nemesis Wow, someone's trolling hard... Mr "other people are in Knindergarden" needs to learn the difference between "your/you're"... If you ever grow up, read up about 'scientific theory'... (I presume you liked your own posts, too...because that's what losers do.)

@fjames208

4 жыл бұрын

True

Amazing lecture, and some great analogies to help understand what's going on. Brilliant

That was an absolutely fantastic lecture. Very clear, very precise. Thank you.

@jameskeith7608

4 жыл бұрын

Whattttttt????????????????????/

I live for the day when these videos will get 20,000,000 views instead of flashy music videos (which will be forgotten in a year or so)

That tutting after each sentence is doing my head in.

@dewfall56

4 жыл бұрын

Thank you for giving that sound a name. Now I know what to call it.

@Slarti

4 жыл бұрын

Yes, it's a really bad habit and he needs to stop it.

@dewfall56

4 жыл бұрын

@@Slarti I actually don't mind it. Call me weird, but I find it rather soothing.

@ksingh7149

4 жыл бұрын

Irritating lol.

@Raumance

3 жыл бұрын

I was wondering why the video had so many dislikes. Didn't even notice it.

Very nice lecture indeed. Captivating, pedagogical, nicely paced. Thanks.

Fantastic Lecture to listen to over a cup of tea ☕️! Professor is very eloquent. Thank you for the upload 👍

@gabecerrato2940

4 жыл бұрын

"T's" up

Great lecture, he explained everything fantastically.

@JSSTyger

4 жыл бұрын

@@stalzemsty1669He eats Sugar Smacks for breakfast.

Absolutely brilliant, very clear and patient explanation!

I love the way Professor Gauntlett kisses the brilliant words he has just uttered.

@RabbitBleed

6 жыл бұрын

Thank you. I'm not a fan of that particular noise, like others, but you've changed my perspective, and now I can watch it.

@stevechristy9355

5 жыл бұрын

Hahahahahahaha omg

@blapty

5 жыл бұрын

Thank you. Glad to know it wasn't just me being over critical. I found this to be very distracting.

@eline1072

5 жыл бұрын

We need a compilation of it repeating non stop.

@nfergistink110

5 жыл бұрын

Lmao 😂👌x

The lecture basically covers how our understanding of the universe and its laws are moving forward..a fascinating topic like Black Holes which are so little known about and so many people talk about them as if they were physicists, makes me wanna punch them in the face when they do that by the way, and I see a lot of comments about lip-smacking and tongue clicking noises, is really your attention span that bad? is your mind really that feeble that you can be distracted from such an amazing topic, by noises we all make?

@user-qx3pu6pe5q

4 жыл бұрын

Serious question, do you feel superior to those commenters?

@HungryWanderer86

4 жыл бұрын

@@user-qx3pu6pe5q HAHAHAHA Yes I'm their god and I'll smite them all with my lightning for being such pretentious shmucks!!

The most beautiful explanation about time singularity in the entire internet.

@kostadinkondev829

4 жыл бұрын

Which is not real is just fary tail so they have something to talk and get paid just brilliant instead of investing in something useful

@JSSTyger

3 жыл бұрын

@@kostadinkondev829Your grammar is absolutely atrocious. You shouldn't be critiquing.

Excellent lecture, really good intro to a lot of current physics.

The experiment with the clip and the magnet at 23:00 left me genuinely shocked. I never actually thought of comparing the gravitational force of Earth with a magnet the size of my thumb. Like he said, it sounds like a simple, meaningless experiment. But it does show without question that gravity is by far weaker than we usually think.

Stunning lecture, and I really appreciate the professional coverage, a joy to watch. Thank you.

@cymoonrbacpro9426

5 жыл бұрын

Harry Percival. EI8HVB stunning only for those that are ignorant!

Excellent lecture about the black holes. Thank you professor.

Excellent presentation. The animation of the stars orbiting the galactic black hole was amazing. I also liked how the presenter emphasized Newton's theories were not disproven so much as subsumed into the larger framework of General Relativity. This is one key aspect of scientific progression that is misunderstood by the general populace.

A really beautiful lecture, thank you.

I just closed my eyes and enjoyed the ambient utters.

Fantastic lecture! Taking something so complex and making it so simple. Im quite earily in my space engineering studies and must say I did not know how the particles formed and collapsed in vacuum before. Thank you professor!

fantastic lecture. Very clear, very precise. Thank you

Great lecture, just leaves me with more questions !!!

Thank you *smack* for this wonderful presentation *smack* Professor :)

@dnelms1

4 жыл бұрын

smack EXACTLY smack THANK YOU!

@IronWarrior4Ever

4 жыл бұрын

Went about 7 mins in to the video, read your comment, then bam it hit me. Great, now that is all I hear is some blah blah blah SMACK!, blah blah blah SMACK!

@tyroneli5462

4 жыл бұрын

Jewdo Master 厂，

@billymanilli

4 жыл бұрын

Sounded like he had 5 or 6 jolly ranchers in his mouth....

the most easy to understand explanation for me so far about how these things fundamentally works. Thank you Professor, great talks.

Excellent description and very helpful understanding of the physics of black holes.

Extremely clear and comprehensible presentation.

Perhaps my biggest peeve of all time: Einstein did not CONCLUDE that the speed of light was constant. He INTERPRETED the constant speed of light that physicists of the time kept observing.

When not even one person giggled at “studying the motion of Uranus”

@liamdienemann8937

6 жыл бұрын

I did xD

@noahwilliams2662

5 жыл бұрын

they were all hoping no one would notice the klingons

@Electronic424

5 жыл бұрын

I wish more people pronounced it as 'Ur-uh-ness' it sounds far more mysterious and ethereal. But nope, your anus.

@MichaelmaxxxxX

5 жыл бұрын

@@noahwilliams2662 kling ons hahahahahahahaaaaa

@blubastud

5 жыл бұрын

I doubted my nerdiness b/c I laughed and no one else did.

WOAH! Amazing demonstration! 29:09 Had no clue the interference was so sensitive... to a sound wave (moving the lasers right?). That was crazy.

KZread recommendation machine: Black holes lectures from the RI back to back to back (this is the third it gave me)...Scientifically super interesting, but I can't imagine a more...apocalyptic subject-related recommendation than that! :D

According to the knowledge we have of black holes, I do believe that black holes must be a single particle . However big or small , they couldn't be made up of many particles . They're one of the missing particles .

@triggerhappyjay4794

4 жыл бұрын

Hmm

@kev.6149

4 жыл бұрын

Gabe Cerrato singularity

Mass(in kilograms)=Charge squared(in Coulombs squared) x 10 to the power minus 7 divided by distance(between two charges in meters). Thus Newton's Law Of Universal Gravitation is absolutely equivalent to Coulomb's Law of electromagnetic attraction (or repulsion) and therefore gravity is identical with electromagnetism and quantum gravity is just electromagnetism of the quanta.

@MarkTillotson

5 жыл бұрын

Electric charge comes in positive and negative varieties though, so its definitely different.

@kennethchow213

5 жыл бұрын

Newton's intuition (though he declined to hypothesize this) was that gravity attracts at near distances, and cohere, but at greater distances, both attracts and repels( that is both positive and negative charges are acted on at greater distance by gravity). Thus both positive and negative charges are subsumed in Newton's Law of Gravity ( "On the Shoulders of Giants" 2002 edition, page 1160).

@kennethchow213

4 жыл бұрын

@@BrettHar123 You can derive the equation from the S.I. units equivalence of 1 coulomb = 1 joule / 1 volt.

I love this topic. I want to know more about this lesson. thankyou

Absolutely superb presentation!!!

Thank you for a fantastic lecture.

@TheQuallsing

2 жыл бұрын

l mm m pååkåup pååkåup puh händige problem opinion å å ljusterö ljusterö och åkte hem honom att han är en fin fin p r och påverka medlemsstaternas å på påtp så n å vad ii å föri öl öl är håhåjaja tvivlar ejnån å kommentar sökbar ny nu nu och och och och åkp the ijj en jagpjj k att jag k jag och och vad lördag ljusterö och åkte åkte hem hem från jobbet ok ok vad lördag ö få pupjuouu å fy medlemsstaternas territorier upp e ok sovapu nui hos min mamma oj då å u

@jersa44

2 жыл бұрын

@@TheQuallsing ???

Recall that gravity is indistinguishable from acceleration. It's a heck of a lot easier to think about acceleration than curved space-time IMO. So, with the acceleration metaphor for gravity in mind, is the following an accurate description of events? Throw a ball up into the air. Our arm's muscle overcomes the ball's weight and gives the ball momentum relative to us. Up it flies. Gravity is not a force, so the ball does not "run out of momentum against the force of gravity and fall back to earth." Instead, is it exactly as if, standing on the earth, our 'floor' is pushing us ever faster upward and outward such that we are being accelerated at 9.8m/s^2, but the ball, not being pushed on by the earth, does not accelerate but rather continues moving uniformly just as it moved the instant it left our hand, with no further forces acting on it, until we, being further accelerated by our connection to the earth, observe the ball seeming to slow its rise, pause, and then change direction to "fall" back down to earth with what appears to us to be a 9.8m/s^2 acceleration. So it's not the ball falling to earth, it's us being accelerated until we overtake the ball's uniform motion. Weird. But okay.

Wonderful lecture. Great, intellectual speaker. Learnt so much about black holes. Tq...

Thanks a lot to show us this beautifull lecture Love you With regards

I found this lecture to be lip smacking good.

@dialupsyndrome1910

5 жыл бұрын

-OK Internet- ha!

@KrustyKlown

5 жыл бұрын

Great speaker, minus the lip smacking .....geeesh, horrible habit

@cymoonrbacpro9426

5 жыл бұрын

Eli King Biting the lips, and lip smacking is a signs of uncertainty!

@JinChohan

4 жыл бұрын

I was peacefully listening until I read this, now I cant help but notice it damnit

@fatoldpal

4 жыл бұрын

It's killing me

If the effect of gravity is instantaneous, how does a gravitational waves work? The very nature of a wave suggests that it propagates from the source which means it takes time for the 'signal' to travel. I'm totally missing something.

@AngeloXification

4 жыл бұрын

From what I understand, in the lecture around the 12 min mark. The observations Newton made were an emergent property of the curvature of space-time. Newton was right to be suspicious about the observations he made, unfortunately he didn't have the scientific capability of making the types of measurements we can make today. The LIGO detectors are an incredibly advanced engineering and technology accomplishment. I sure wish I could get into the field of physics haha

@amisfitpuivk

4 жыл бұрын

'instantaneous' would still be limited by the speed of light though I think. I also know space-time itself doesn't have that speed limit, but I think any kind of wave would have that speed limit, which would still make it 'instant' since that the fastest speed information can travel. I think?

@theodorostsilikis4025

4 жыл бұрын

if sun disappeared now earth would still feel its gravity for 8,3 minutes

@bluesteel7874

4 жыл бұрын

I heard from another lecture that they confirmed that light and gravity travels at around the same speed because of a star that was detected by Ligo and by observatories. Been binging so I can't remember which video.

In quantum mechanics, the concept of a point-like particle is complicated by the Heisenberg uncertainty principle, because even an elementary particle, with no internal structure, occupies a nonzero volume... but great lecture 🔥🔥🔥

Beautiful lecture ... Overwhelming ... Humbling ...

@hellothere8675

2 жыл бұрын

Really

I've been sick so I put on some lectures to listen to while I rest, I fell asleep and the nextvideos opening theme came on. I think my heart stopped for a moment and sh*t myself...

@TheRoyalInstitution

6 жыл бұрын

We've made them less deafeningly loud recently. Sorry for the scare!

I fell asleep listening to this and had awesome scifi dreams about traveling through black holes!

@Bytrl

4 жыл бұрын

You were dreaming about what we might actually be doing. Pretty insightful. Our perception of the expansion or inflation of the universe would be exactly the same assuming we were collapsing in, rather than far out galaxies moving away. This would also serve to explain dark energy, or how 'empty' space, contains 99% of the energy within the cosmos. I'm convinced our current theories about the nature of our reality are exactly opposite the truth, and were too stubborn to retheorize these fundamental understandings, for fear of reprisal.

One of the very best RI-lectures.

Great demonstration... About the topic... 👏

19:30 pretty cool that the star that passed the closest reached a vertex (point (0,0) on an x^2 parabola) almost exactly at year 2000. just coincidence but a pretty neat one.

@ballelort87

5 жыл бұрын

No one cares

@aarishsyed9587

5 жыл бұрын

it might be stimulated.. who knows. :/ Some coincidences are too good to be true

didn't even notice the lip smacking until I read the comments and even after that it didn't bother me!

@DoggoWillink

6 жыл бұрын

udo dirkschneider I noticed it but it didn’t bother me. That’s just something some people do, including a lot of lecturers.

@TheWaveofbabies

6 жыл бұрын

udo dirkschneider you weren't really listening then.

@giuseppe3010

5 жыл бұрын

UDO: but his lip smacking is better than the "haaa.... haaa" uttered during pauses in between sentences by other speakers !!

@R369B

5 жыл бұрын

I didn't notice either but after it was pointed out it was all I could hear lol

@Flapjackbatter

5 жыл бұрын

Polite and considerate people don't do that.

This lecture is mind blowing

A demonstration of the art of speaking at its best. Prof. Gauntlett has a superb command of his material, speaks beautifully and rationally, and does not invent arbitrary nonsenses to make his facts and his ideas, which he distinguishes well, fit into any arbitrary plan. A very fine and responsible teacher! He speaks the macro and quantum views being unconnected in the concepts we have achieved so far with elegance and precision from 47:33.

Brilliant.

My daughter was genuinely being born as I was listening to this. 8 lbs 10 ounces gotta love wireless headphones

@TheRoyalInstitution

5 жыл бұрын

Wow. This might genuinely be the best endorsement we have ever received.

@tonycrofts4640

5 жыл бұрын

SO WHERE WERE YOU??

@painplayer1614

5 жыл бұрын

Holding my wifes hand as she pushed lol

@jackkessler9876

4 жыл бұрын

That is one big baby. Condolences to your wife. Congratulations to you both.

@gailcirillo3294

4 жыл бұрын

Happy birthday baby

Wonderful. Thank you.

A great presentation, deep and humbling. Science should be a humble are of life because one is venturing into the actual creation of LIFE! Thank you and very encouraging.

The opening theme is too loud. I've been following this channel for years, and I jump out of my skin every single time I play a video. Would someone do something about it, please? Thanks.

@ThePastelAssassin

6 жыл бұрын

KZread has this function called Auto-Play, where it'll automatically play the next video before you can alter the volume lower. The lecture volume is fine. The intro isn't. I do agree it's minorly cumbersome to have to manually lower the volume specifically for the first 6 seconds of every lecture video but then not have to adjust the volume after.

@ExistentialistDasein

6 жыл бұрын

Yes, that's what I meant: only the first few seconds when the logo is showing, otherwise I have nothing against the lecture volume as a whole.

@a_4421

6 жыл бұрын

Agreed!

@BattleBunny1979

6 жыл бұрын

agreed

@PonceTheArg

6 жыл бұрын

yup

11:35 Here the idea that in GR gravity is understood as curvature of spacetime and not a force in Newtonian sense is explained by an analogy which assumes that gravity is a force in Newtonian sense :-)

@jackkessler9876

4 жыл бұрын

I agree. That was sloppy. A clearer image is that everything moves in a straight line and that the space they travel in is curved. The straight line in curved space image makes the most sense to me.

I have many questions, but first, about the LIGO or interferometer specifically. Does the gravity wave manifest as a space or time distortion or is it a spacetime distortion? Does one arm see a length change or is the wavelength phase modulated or is there difference between looking at it either way over what is happening in the other arm? Is a gravity wave propagated as orthogonal space and time fields analogous to EM waves? Where can I find these answers?

Great concise explanation of black holes.

"Gravity, my old nemesis, you win again" - Zap Brannigan

It's not lip smacking he's blowing kisses to me while I listen. Ya'll just jealous.

@chuckschillingvideos

4 жыл бұрын

Trust me - even if every word of this is true, not one soul on this earth is jealous.

@neighborlyfiend1484

4 жыл бұрын

@@chuckschillingvideos Cleaver girl

@ibuprofen303

3 жыл бұрын

Actually, I am experiencing a different kind of lip smacking in the form of I have some fried chicken in front of me currently. It's "Lip smacking" goooo-ooooooooooodddd.

Excellent talk.

Finally! New info on black holes. After learning their was a extra large blackhole in our galaxy I freaked out! My basic understanding of them was that they gobble everything up and nothing could escape. I can rest now knowing that they disappeared leaving behind what they gobbled up. In what state is the matter in after being gobbled up?

The zero-point energy emitted might be the origin of the discovered dark energy, which comprise 73% of the total mass of the universe. My surmise is that dark energy then condense into dark matter, which in turn condense into ordinary matter:hydrogen atoms, thus completing an eternal cosmic cycle of matter to energy, and energy to matter.

@markusheimerl8735

4 жыл бұрын

if you mean hawking radiation by "zero-point energy" this cannot be. Dark Matter and Dark Energy are not radiation, as any known form of radiation, that includes the one coming from a black hole, does not behave how they do. Dark Matter seems to only interact through gravity, not any other force. All forms of radiation interact with the electromagnatic field.

@bluesteel7874

4 жыл бұрын

"my surmise" is bad phrasing. Dark matter and dark energy are theorized because physicist has a general idea of the amount of matter present in the entire universe and the gravitational behaviour suggest there are more "things" than just ordinary matter. Also, matter don't just disappear, you can follow how they evolve from compound to compound and matter to energy. This doesn't mean your theory is wrong though, just that physicist have their ducks in a row, and are most likely justified being puzzled or justified how they postulate ideas.

@phillyb8347

4 жыл бұрын

Maybe there is no dark matter/energy

For some reason, I imagine Ed Bassmaster giving this lecture. Would ya just look at it?! *cackle*

Very interesting. Your lecture provided me with some basic orientations about how gravitational waves may open a new perspective for physics. Thank you!

@ around 11:25 he says imagine space is like a rubber sheet... the way i see it it's more like an infinite ocean and matter inside of it pushes/displaces the water around it just like when you enter a bath tub and water rises. The more massive an object is the stronger the gravity and the more spacetime is bent around it.

I find your conception of our universe quite bizzare.

I definitely have not a good understanding of the physics of black holes, but something tells me this guy has neither. I think he should have talked more about the nature of the event horizon, how things falling in to an external observer seem to get stuck there forever, due to the apparent slowing down of the time, due to the gravitational field. So the information that "is lost" when the black hole forms is just "piled up" at the event horizon. As I understand it, the event horizon is just how that central singularity appears to the the external observer, since the deformed space around the black hole cannot be simply mapped to the undeformed space we are used to. He could also have talked about how a black hole is formed: does the event horizon appear at some finite radius, or does it start at zero radius, expanding outwards, pushing all the space and all matter with it out from the center? What happens with the event horizons, and the piled-up matter, when two black holes merge? Will some matter pass into the new black hole, or will it rearrange on the outside of the new event horizon? Remember, that the time "stands still" on the event horizon, so it should in some way be stiff or behave as thick syrup. Or have I misunderstood everything? Probably...

@Winchestro

5 жыл бұрын

And with "this guy" you mean Professor Gauntlett?

@IngolfDahl

5 жыл бұрын

@@Winchestro yes

@amedeofilippi6336

5 жыл бұрын

Ingolf Dahl I believe all matter falling into a black hole I prefer to think of a black sphere whose radius is always higher than the BH one) gets displaced on a thin layer around the sphere and an outside observer could only see that with time getting frozen for him. All mass and all information remains trapped within this superficial layer but this from the outside observer standpoint only. What happens inside the Black sphere we can’t say anything at all. Most probably our universe is the biggest black sphere we are living in.

excellent talk

So informative and so beautifully, so patiently presented so that even novices like me could undestand! Thank you for the lecture!

"Fascinating" "It's coming at us!" "Fascinating" "Run!!!" "Fascinating" "You're being sucked into it!!!" "Fascinatiiiiiiiiiinnnnng"

My theory is that all matter and space comes from SPACE ITSELF .

@ingodwetrustgachatuber2747

4 жыл бұрын

Fake! Does that make sense? How can you prove scientifically that something came from nothing? Is that even science?

@Espectador666

4 жыл бұрын

@@ingodwetrustgachatuber2747 silence. Religion is what is not even science.

WONDERFUL LECTURE FROM GRAVITY ALL THE WAY TO STRING THEORY

I'm just now watching this lecture...after SagA* has been confirmed and "photographed".......how cool is science!!!!

But the ball goes around the curved sheet because of gravitational force in the first place...so what causes the objects to move in curved spacetime?

@anivegmin

6 жыл бұрын

In the curved sheet analogy the ball is already moving (in a straight line) before it hits the curve. The curve of spacetime is what causes the ball to change direction/go into orbit/accelerate etc as it takes the shortest/straightest path in that curve of spacetime (which is actually 3 dimensions of frictionless space and 1 dimension of time - spacetime, not the crude analogy of a 2D sheet). In general relativity, gravity is not a force, it is the curvature of spacetime. Any number of different forces could have been initially applied to that object to set it in motion in the first place (a push, an explosion, a collision etc etc). Spacetime is an almost impossible thing to visualise and any analogy is going to fail in some respect. The only true explanation is the mathematics.

@mrEofPlanetEarth

6 жыл бұрын

Amit Mondal ..INERTIA!!

@vasylshcherban4825

5 жыл бұрын

Marcos, you are right, it all is irrational BS... The problem is that all physic is irrational BS... Literally... The whole physic is just fully abstract set of rules that has no connection to reality... Except one point... if you follow these abstractions carefully, you will see that they predict what you see in reality very closely.

@turtle2720

5 жыл бұрын

@@vasylshcherban4825 If physics doesn't apply to the real world then I wonder what device you used to write your comment :)

@vasylshcherban4825

5 жыл бұрын

@@turtle2720 please read my comment carefully... and you will see that I wrote "you will see that they predict what you see in reality very closely" - where they are abstract rules (laws) of physics... So yes, physics really helps us to build very interesting things (including devices)... but laws of physics (strictly speaking) are abstract. There are no physical entity in real World that represent laws of physics... So shortly speaking, yes, we do apply (abstract) physics to real World. In any case, I am glad that you found my comment... it probably means that you saw video... that is really cool video.

he really needs to sort out that tutting tick, proper baked my noodle

@jackkessler9876

4 жыл бұрын

Jack Kessler I am watching this on a 2009 iMac 27". There is no lip-smacking / tutting sound. Check your source.

Fantastic lecture

is graviton an elemental particle that is somehow responsible for the gravitational field or the geometric orientation of space time or is it a different quantum particle?

New drinking game! Take a shot for every lip smack

@MARTINELSA1

4 жыл бұрын

The guy is obviously handicapped. What a dilemma. Excellent information but unshareable. Because this guy a lip smacking fiend.

@deathwrenchcustom

4 жыл бұрын

I tried your game. By the fercond somonnn aye wass clooooooo-MARFT!! 🤪🤪🤪

...more energy than from every sun in the universe? That is a lot. Even for two gigantic black holes colliding...

@nemesis4785

5 жыл бұрын

36 septillion yottawatts; about 50 times more. Yep, that sure is a lot.

@thomasr7129

5 жыл бұрын

@@nemesis4785 sounds like a made up number, but a quick web search confirms it: www.sciencenews.org/article/black-hole-smashup-generated-yottawatts-power

@jackkessler9876

4 жыл бұрын

@@thomasr7129 @Nemesis It's true. Converting three solar masses to energy almost instantly produces a lotta yotta.

Great lecture

Great study by this magnificent Lecture. 😁👍