Black holes are Bubbles of light
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- čas přidán 23. 08. 2021
- A very short video to understand the fundamental nature of black holes.
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#VeritasiumContest
Email address : scienceclic@gmail.com
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Alessandro Roussel,
For more info: www.alessandroroussel.com/en - Věda a technologie
This video was created for the SciComm contest launched by the CZcams channel "Veritasium". Don't worry if you find it too short, a much longer video is coming really soon, in a few days !
Good Luck Buddy, you really rock it!
Best,
Florian from IG
The video said that when it collapsed, it's gravity pulled the fabric of space. Okay: 1) What exactly is 'space' that it can be pulled? 2) What exactly is 'gravity' that it can do what it does? 3) How exactly does gravity pull at the fabric of space to collapse space?
really hope you guys win and get noticed more by the veritasium audience, your content is always top notch
Awesome
@@charlesbrightman4237 It was a very short video so I didn't have time to address these important questions, but if you want I have done these two videos that should cover it : czcams.com/video/YRgBLVI3suM/video.html czcams.com/video/wrwgIjBUYVc/video.html
You clearly match the contest description "people who can explain difficult concepts in a clear and creative way". I hope you win and get a boost to the channel.
Thank you very much!
@@ScienceClicEN Totally deserve the win!
@@ScienceClicEN Absolutely deserve to win.
No way, he made a completly false and misleading statement.
@@dor00012 Being?
This is a new perspective I have never thought about...
Well this explains why you need to travel faster than light to escape a black hole
If you want to read more about it, look for "null hypersurfaces" and "Killing horizons". Basically, the event horizon of a black hole is the lightcone (or should we rather say, the "light-bubble" in 3D) of the center of the star at a specific moment during its collapse (en.wikipedia.org/wiki/Null_hypersurface)
Seems like just conflating two sort of related concepts with one another but really overstretching that relationship into meaning when there really isn't much of one.
@@tritonlandscaping1505 It is actually very related, and is almost the mathematical definition of what a black hole is. The black hole is the future lightcone of the center of the star at a specific time during the collapse. This lightcone structure is evident in the Penrose diagram of a gravitational collapse. And a lightcone is a bubble of light that grows over time.
@@ScienceClicEN I like the video, and hope you win. That being said, wouldn't you agree that a light cone is better described as a bubble of causality than a bubble of light? You can have a bubble of causality with no light (gravitational waves from two merging black holes being an obvious example); but you can't have a bubble of light without that bubble of causality. The light bubble is the passenger riding the causality bubble, so to speak.
Still, the video fits the spirit of the contest, and I really enjoy this perspective in an artistic way. I just think it's good to acknowledge the artistic angle taken in the effort to make the video more interesting.
NOBODY explains astrophysics, relativity and quantum mechanics as incredibly as YOU do! I've learned so much just from the change of perspective you teach in your videos. I wish you become a big successful science communicator in the future! 🙏
Thank you very much ! I'm glad you enjoy the videos :)
Totally agree with you, finding this channel was a blessing, I've been sharing all his videos ever since!
Absolutely agree
@@ScienceClicEN You ROCK bro.
Just Found your channel two days ago where you explained the visualization of curved space.
Hope you win this.
@@ScienceClicEN I must agree. You _ARE_ the best channel for this kind of stuff! Lots of stuff I couldn't understand, but then I found your videos and was like "*click* Now I get it!"
Literally said out loud: 'Woah, that is so cool.'
This channel is the best science communication channel I've ever found. Me and my dad (a retired science teacher) were both absolutely blown away by the video showing a new way to illustrate the curvature of spacetime by massive objects, and how that gives rise to the effect we call "gravity". That was the first time I really grasped it, and my dad was extremely impressed. Since then we have both been huge fans of this channel & this video is no exception. I really hope it wins, you guys deserve it!
Thank you very much for your support both you and your dad, happy to hear you like the videos!
You singlehandedly ignited a huge interest in astrophysics in me, your videos are astoundingly good, you have my thanks!
if you don't like maths, your aversion to mathematics can singlehandedly extinguish that interest, So you better start liking maths, which isn't that hard, you just have to realize the beauty of it.
@@mastershooter64
You cannot appreciate the beauty of math without being at least mildly scared of it... I mean, I’ve seen monsters in there that gave me the worst kind of anxiety and I’m not talking about complex calculus or hyperdimensional objects... those are beautiful and easy to understand... nooo... I’m talking about stuff as simple as Ulam spirals and 3n+1 sequences. Math is beautiful but it’s hella scary. I don’t even want to think about the decidability of some unsolved problems.
@@mastershooter64 I absolutely do love maths, always enjoyed it a lot, but these videos made me love physics/astrophysics.
@@m.d4375 awesome!
@@mastershooter64 No one can like math just because they have to. That's not how emotions work.
This is easily among the top 3 submissions for this contest. Maybe even the best
Every time I watch one of your videos I feel my brain exploding 🤯🤯🤯 . You make hard concepts so easy to understand that puts other science experts to shame!! Keep up the awesome work, you deserve every credit for your contributions! 👏👏
I am always stunned by your way of explaining difficult concepts. Best of luck in the contest!
Thank you !
Out of all the science YT channels that I follow(and there are a lot) doing short ~1min videos for the VeritasiumContest, this one is definitely my favorite.
I LOVE this channel.
Very clean and concise. Nicely done!
Thanks !
Perfect analogy.
This channel is on the same level as those really high budget education channels. And you explain the concepts so well too
Don't tell him that! He might start charging for it!
@@tricky778 ekhhhmm Vsauce ekhhhmmm
Don't get pulled in into this channel, this video is more like pseudoscience. czcams.com/video/uuWvJXZT5vQ/video.html&lc=UgyTwc8LrX0eA4m6idd4AaABAg.9RsgEwaULrH9Rw80X556gc
So cool!! Great video. Good luck!!!!
Thanks !
You should create a more complex video about black holes showing the quantum behavior on the surface of the black hole
I really thought I had understood something about black holes. I now realized that I hadn't and it feels that I have understood black holes much better than before. Which makes me afraid that I haven't understood anything at all yet.
lmao
The entire Power of the Dunning-Kruger Effect showing off
It makes me think the education of our time made it difficult to understand on purpose 😏 keep the masses DUMB 😉
PBS Spacetime gives a really great perspective on Black Holes as well which is very different but also helpful (relies more on thinking of time as a dimension similar to space that with the language and visualization of flow used here). I find by viewing many different perspectives, as well as by viewing different framings of similar ideas, one can get at a better understanding of a subject
@@Jordan-zk2wd yeah, I've been watching their videos for quite some years now.
I wouldn't really understand relativity without this channel. I mean, I still don't *really* understand it, but I wouldn't understand it as much as I do. Thanks for that.
AGREED 👍👍
Space does not contract. Space-time warps.
A bubble of light is hardly analogous to a black hole. Once you are inside the event horizon, all roads lead to the singularity at the center. Just because I see the light from a candle does not mean I will be drawn into it (unless I'm a moth, which are apparently susceptible to the OP's pseudo-scientific descriptions of reality).
It's truly a shame this pseudo-science description is sucking all you guys in.
@@markmidwest7092 Why did you make this comment?
If your goal was to educate, your method is demonstrably horrible at doing that. If your goal was to change minds, your method is demonstrably horrible at doing that. Have you never noticed how rarely people change their minds while they're being insulted? If this isn't somehow news to you, then why did you make your comment? This isn't a rhetorical question, I genuinely want to know.
Also, it seems like you've misunderstood what was being illustrated in this video. No one is saying that when you light a candle it means you are drawn into it. That's not what this video said at all. Rather, when you see a candle, you and that candle are causally linked. The light from the candle interacted with the receptors in your eyeballs, and this enabled you to see it.
When the candle is lit, a bubble of causality propagates at the speed of light, and everything in that bubble becomes causally linked to it. Inside the event horizon of a black hole, that bubble of causality ends at the event horizon.
@@ppppp524 Comparing the black hole to a bubble of light is a terrible analogy, especially where the OP states that space is being sucked into the black hole. Space-time is dragged around a rotating black hole but space is not "sucked in" . . .
If this were just some amateur trying to put something out there that would be one thing.
This guy is pretending to be an expert and trying to win a contest by teaching false science. It's disgusting.
@@markmidwest7092 You strike me as the sort of assholes who goes around saying shit like "science doesn't 'suck'" and gets overly pedantic about centripetal and centrifugal force and thinks they're clever
Omg you always have novel perspectives on things. One of the most creative explainers out there. Good job💪🏼
Man, it is awesome to see this channel in the competition. I have been following the channel for 1+ year, and you are one of the best at explaining quantum mechanics, relativity, and physics in general. You are ahead in the lead, and I hope winning the contest will bring more traffic to your channel. The quality of your work is so outstanding that makes me think that only having 170k subs is kind of offensive.
Ikr
Tu mérites de gagner ce concours!
Tes vidéos sont très clairs et concises.
Bravo!
This is the perfect opportunity to gain more publicity! I so hope this is mentioned by Veritasium if not even the whole channel!
I'm french, and I must say, his channel is one the few I really like. Didn't even know there was an english version, but glad to see culture doesn't care about frontiers. Due to the way Alessandro explains, it should spread around the world, translated in the most languages possible :)
your videos are so entertaining you have no idea
nice explanation. by the way, the whole channel is great. Keep it the good work
Thank you ! Glad you like the channel :)
This channel is pure genius. It’s a true treat when I see a new video pop up. 🙏🙏
That is mind blowing
Your videos and explanations are incredible. Especially love the visuals. Helps a lot in understanding these complex themes.
I'm an accountant but I deeply love astronomy. Your channel has immensely helped me discover, explore and expand my interest in astronomy. Thank you and I hope you win this contest. Veritasium is also one of my fave channels.
That was amazing. I got to understand so much in such a short time. I'm sure you are going to win this contest.
Thank you.
P.S: I think short videos like this in CZcams Shorts will be very successful and helpful for a lot of people.
Thank you, I'm glad you liked it !
If the speed of inward stretching (of spacetime) is equal to the light speed, then the outgoing photons moving in spacetime interact with more and more spacetime coming towards them at c. We are familiar with photons travelling relative to a static nonmoving spacetime. This means in the above video, the photons have to remain frozen in place. Since photons have no rest mass but only have 'energy as mass' (hf=mc^2), and their energy doesn't change (hence freq doesn't change) they undergo no doppler shift. Hence, we don't 'see' the 'black hole' in spacetime (but we know its there because of surrounding matter and how gravitationally redshifted it is).
This channel is really amazing. I've been watching many excellent channels about physics, and this one is the last one I discovered and I really love it. Very clear explanations for many complex concepts. Thank you very much for all these videos.
This is the best definition of Blackhole , I've ever seen and probably will see in future:)
That's... one of the best descriptions of a black hole I've ever heard.
Actually it's one of the worst. It's an analogy at best. You can't get out from the "light bubble" of a candle because you can't outrun the lightwave, but the event horizon of a black hole is not a thing, it's a special region like a Lagrange point, it's not made from the last emitted light bubble, it's not made from anything. And the collapsed star doesn't pull the fabric of spacetime, it curves it, there's a difference. It's not like a black hole puts a force on you to suck you in, it's more like a chute, if you get too close, you have nowhere else to go but towards the center of the black hole. That's the whole point of GR, gravity is not a force according to this theory.
"Bubbles of light frozen by gravity."
WoW.
I myself participated in this contest but i really wish you win it .
Good Luck ScienceClic !
What did you do
@@bandiddums I'm hoping he placed some microbes in some alcohol.
@@bandiddums you can check it on my channel but its trash but its my first good blender 2d animation.
@@NinjaOfLU 😂 lol no its an allegory
@@yeastinchampagne440 hey I just watched it and I think it's pretty good! One thing though, I think the ending is a bit abrupt, almost seemed like you got cut off mid sentence. Otherwise, very good explanation.
Your way of explaining such a difficult concepts is unbelieveble.love from pakistan.
One of the best educative science channel on youtube!
Really hope you win this contest because this channel have a quality to subs ratio of 1000 to 1
♥️
An observer can never exceed his causal 4-velocity. However, he can exist beyond his "light-cone" without exceeding the speed of light due to spacetime curvature. Light-cones and "causal-cones" are only equivalent in the special case of flat spacetime (and if we are going to talk about blackholes that is not the case).
It is possible that the singularity continues to emit light, only the curvature within the event horizon will drag it back to the singularity. Radial light on the horizon is not frozen either; the Schwarzschild radius will increase and that light will fall into the singularity, or the radius will decrease and the light will escape.
could you please explain that in a simpler way?
@@felipebenevides9224 Not op but I can answer quickly for you. Black holes don't "suck" things in so spacetime isn't being pulled along underneath the outgoing light rays. The light is still travelling in a direction and traversing over a distance, as we normally imagine it to, it's just that spacetime is curved by the immense gravity so much that all "outward" facing trajectories of light always end up back at the black hole before being able to reach us where we are observing it--or interact with things outside of that region of spacetime. In effect there becomes no path that leads away from the black hole. If you could stand on the event horizon and look "up" you would notice the extreme curvature of space because all you would see is the black hole--you wouldn't see any stars or anything else but the event horizon. It would be like standing on the inside of ball.
The user also mentions that the event horizon isn't a static point around the black hole like the video suggests. As the black hole entangles more matter that radius (event horizon) will expand, thus entangling beams of light orbiting the black hole, and as the black hole emits radiation and shrinks, beams of nearly entangled light will potentially "escape". You can look up what a geodesic is, as that will help imagine the curved path a particle moving in straight line will take--like how you walk in a straight line on the surface of the earth even though you're walking on a curved globe--but the best thing you can do is let go of the conception that things are being sucked into a black hole. It's not you can't run away from a black hole it's that spacetime becomes so curved you can't face away from it.
EDIT: Sorry, as to their very first point on light cones--in extremely curved space like the kind you'd experience orbiting a black hole--you could light a candle and by facing the in right direction (and there would be more than one to choose from) you could look at it still unlit because the light bouncing off the unlit candle would curve with spacetime and point back at you. You would also be able to see yourself lighting it, both in real time and in "echos", depending on the path that light took through curved space time as it arrived back at your vantage point. But because observers can't exist beyond their causal interactions the curvature can't become so extreme that you could see yourself lighting it before you lit the candle--the cart always follows the horse so to speak. We just perceive them as being instantaneous and interchangeable in our relatively flat spacetime, but in a curved spacetime it becomes clear which has to come first. The video imagines that in order to see the candle unlit again, or "escape the light sphere it first emitted" you'd have to catch up to those rays of light and move past them, then turn around look at the candle to see it be sparked again, but in extreme curvature you'd wouldn't have to move at all.
@@anhi399, you say “It's not you can't run away from a black hole it's that spacetime becomes so curved you can't face away from it.” If that’s true, then when you cross the event horizon, you wouldn’t be able to see anything of the outside universe, right? But that’s not what happens, at least not for supermassive black holes: czcams.com/video/4rTv9wvvat8/video.html.
I truly love this channel. You guys explain things in the best way. Greatest science channel ever!
Beautiful and simple as always!
you're so damn good at making things simple.
It's simple but misleading. If anything, it confuses non-scientific people into thinking that light and space-time information are the same thing. Which they aren't...
I'm impressed by the animation, wonder what program he used? Really puts mine to shame. I thought, simulating light using SVG would be easy enough and didn't need fancy software...
@@virajkhatri7574 Don't know what you're trying to say; if you think this is misleading you need to explain yourself better; the concept is simple
@@virajkhatri7574 An apple is a fruit. An apple is red or green. An apple is sweet or sour.
I think everyone understands an apple can be explained multiple ways and concepts that aren't necessarily connected to eachother.
Black hole is a bubble of light made of light trying to go outwards but space pulling inwards. That won't define exactly what a black hole does, but just as ''an apple is a fruit'', its simply true, nobody is questioning the functionailities of the apple, isnt it in fact the purpose to explain it simple to make people want to know more about astrophysics.
Absolute BRILLIANT!
Btw you should turn this video into a #shorts so more people get to see this!
That was mind blowing explanation. Short and sharp 👌
rooting for you :D definitely deserve more attention
Waiting for the full video 🤯🤪
Ahah I have to do one now, right ? ;)
@@ScienceClicEN Yes, the people demand it !
Good luck! You deserve a big win. I love the content.
MAN!! every freaking time i come to your videos im hit with a perspective ive never ever heard or imagined before...
incredible
This video earned you a new sub. This is the best intuitive description of a black hole I've ever seen.
A very interesting video. In this one, English (which is not my native tongue) seems very accessible to me (even without using subtitles). Besides the script and the diction, I appreciate the quality of the animations. The proposed "change in perspective" makes the understanding of the nature of the black hole more intuitive. The video makes you want to know more about black holes. Congratulations! and thanks a lot!
Before I read the explanation: what, this is 1 minute long, damn !!!
After: YEEESSS!!
You, Primer, and Fireship, are the best boys in my sub feed. Short and precise explanation over complicated topics. Amazing.
One minute video and it doesn’t feel rushed or like it missed any points. Clear, concise, and correct. Nice job 👏
amazing content
So efficient, interesting and exciting!
You got all my support for the contest! I hope you'll win it!
This has to win. I freakin' love this channel and the talking guy.
Thank you.. This information eases the headaches that come with thinking about it...
Wow! Wicked concept wonderfully visualised! Awesome work, man!
Thanks !
@@ScienceClicEN you're so welcome! I've been watching your videos since the beginning, I'm really grateful for all your content. Thank you so much for everything you're doing :)
One of best videos participating in the contest for sure, all the best!! 🚀
Wow. Very interesting perspective!
What the wonderful explanation!
Love your voice, amazing content !
Wow! Explained one of the most complex thing in the universe in under a minute. You deserve winning. Fantastic!
This is the best explanation and simplest presentation for black holes that I've watched on youtube so far...Thanks again ScienceClic!
As always, amazing video! 🤯💖
That is so beautiful!
Best physics complex concept explanation channel hands down no contest
simply incredible. thank you
This is awesome!
I've never thought about it like this, this is epic! Also the 60fps is true pleasure for my eyes. Do you plan to make your normally long videos in 60 fps as well?
Wish you luck in the contest!
Thank you ! I'm glad you liked the 60fps, I also thinks it really adds something to the experience. However sadly it also increases the render time by a lot. For a short video like this one I could do it (it took 2 hours to render), but for a longer video (say 15 minutes) it would take much much longer (~30 hours) so for the moment I'm sticking with 25fps. However the series on the math of General Relativity was done in 50fps (because I already had done the render of half the frames for the French version)
@@ScienceClicEN Make it 8K + 60fps.
69th like
@@ristopaasivirta9770 extrapolating those frames likely cost more computing resources than just rendering them directly although i could be wrong
@@ScienceClicEN Can you let me know what program you used? The animations look so gorgeous would love to be able to make something as nice. My submission is so visually bad compared to yours, can't say I'm not jealous. 😂 Good luck!
Just awesome description.
As an incredibly online visual learner your channel is hands down SSS tier. You all deserve so much good luck!
Fantastic explanation ! Black holes made simple in one minute. So enlightening ;-) Great film, great voice !
Dude this video is dumb.. all he says is light cant escape a black hole.. did you not know that ?
Well that was actually very interesting and informative way of looking at a black hole
i dont understand how ive never found your channel before now. i look this stuff up constantly. these are some of the cleanest animations and examples ever.
Excellent video! Crystal clear, It is the first time that I see a blackhole explained from this point of view!
Finally someone explained it for us to understand. Please do one how a handful of quantum particles create the universe. Are we all energy?
short answer, yes we are
There are many ideas in physics about light but none of them can explain what the experience of blue is like to a person who's never seen blue before. Science does not know what consciousness is. Science doesn't know what ideas are. Science can't even be sure if people exist. You'd need more than particles & energy.
@@alwaysdisputin9930 True! Conscious experience is a philosophical concept which physics can't describe or explain. There are many questions there which we may never get definitive answers for.
Excelente
Your explanations are top notch!
Easy to understand und always to the point with great examples!
Keep it up!
OMG ! why no one ever told me this! Its always Science Clic who does it - mind blown
Love it !
New conception . Very interesting. We wait argument.
If a concept clearly describes a thing, whether it’s is a scientifically accurate description or not, it cannot be argued….IMO.🧐
Yeah, what are we arguing?🤔 I would love to hear rebuts on this🤭🤣🤣 there's nothing to argue....
@@digdug6515 The argument is how dumb you all are. This video says light can't escape a black hole lmfaooo we know this for about 100 years now. Nothing new, no new concept just a bunch of dummies saying wow ... water is .... water!!!
This channel is so amazing and explains everything so well!
Ive been following your channel and this 1 minute video is truly commendable, good luck!
Amazing
The greatest bubble of them all.
Best entry I’ve seen yet
MY GOD !!! This channel never ceases to amaze me.
This seems waaaay more interesting than to be done with after a 1 min video. Hopefully there is more to come about this subject!
I'll have to do a longer video on the topic ;)
@@ScienceClicEN Please do. This new way of thinking about black holes blew my mind!
Cool stuff
Simple explanation for something so complicated. Wonderful!
This video is so great! It's nice to relearn something in a more intuitive, novel, and interesting way.
"Black holes are bubbles of light frozen by gravity."
Wait so if light can (relatively) stop due to space time, does this mean that since the universe is expanding light could travel faster than light (relatively)? 🤔
Yes that's exactly right. It's only locally that light must travel at a fixed speed. But if you watch it from a distance you can see it move slower or faster depending on how spacetime behaves there.
@@ScienceClicEN Superb 👍
0:18 "once he has seen the candle light b cannot get out of the bubble" bummer
This is one of the simplest explanation i have seen for blackholes.
You just blew my mind !
I have never thought of a block hole like that.
Hello. Would you consider making a video (or series of videos) on Quantum Teleportation? It is a very challenging subject to get your head around but if anyone could do this subject justice, it is ScienceClic!
I never do thar kind of stuff, but this channel clearly deserves it. Just a lil comment for promotion:) great vid and explanation btw
Your channel is the 3blue1brown of physics. Genuinely fantastic visualisations and explanations of not always simple concepts.
Your videos are always amazing thank you so much for making them