Hi friends, thanks so much for watching! Please feel free to subscribe, and check out my video on the Schwarzschild (stationary black hole) metric here: ruclips.net/video/ci06S-jNn8U/видео.html
hello sir do you know a database for angular momentum of AGN's. i need it for my extended essay and i have searched the entire internet and could not find a database with angular momentum of the AGN and the galaxy that they are in. i am sorry but now i just have to beg for databases from people.
I still need to figure out how do i measure it's size (Unless it's just an Oblate spheroid in that matter), or how do i connect that property with the radius equation of a KBH
Fabulous, you explain things so clear and concise; you dumb it down enough for me to understand perfectly. I can't wait to see more of your videos on blackholes.
im starting research on black holes this summer and watched this when i was getting too confused in the book im reading. perfect explanation great visuals thank u so much :)
I'm sure you understand there are people, me in particular, who have no know idea what a black hole is, let alone describe it to someone, except a two year old human......lol, so thank you for sharing what you know as clear as you , so well do, to this seventy year old human
First question. My understanding is that for electrons to have the size currently assumed, the out part of the electron must be moving faster than the speed of light. Might the Kerr equation also apply to electrons and that they they are disks as well? Second question. When two black holes merge, presumably they must be rotating in the opposite direction to accommodate the frame dragging. If they also have charge then the merger must be pole to pole? Third question. How do black holes dump heat or is the heat they absorb/generate converted into mass?
hi, I can only partially answer your first question: I've never read anywhere this fact about the electron, and I don't know if it's true, but what I can tell you is that unfortunately for now, General Relativity doesn't deal with the microscopic world at all, so you can't really use it to predict the features of the electron. Sorry for the likely disappointment, but that's the limit of the theory
COULD YOU PLZ MAKE A VIDEO OF THE LAST MAXWELL EQUATION AS PEOPLE LOVED THE SERIES AND I THINK YOU SHOULD FINISH IT AS WELL. (there are no good videos of 4th maxwell equation on youtube😅😅) @parthg
This raises many questions, what is the angular momentum of the blackhole, does the photon orbit the blackhole at the same angular speed as the blackhole?
Based on this presentation, does it possible that the rotating blackhole is moving much faster than the speed of a photon since a photon needs to move at the same direction with the rotating blackhole? By the way, nice presentation, as always.
Nope, sorry I realise that was not clear. The photon only needs to move in the same direction as the rotation of the black hole, but the black hole (or specifically its event horizon) does not need to move with the same speed as the photon. Thanks for watching as always :)
@@ParthGChannel I see. I was just wondering how this rotating black hole affects or changes the direction of the incoming photon. I am just curious since I don't have advanced knowledge about this. This is a very cool topic 😁😁.
I came to this video mainly because I wanted to know about outer and inner even horizon but i didn't understand much about the inner event horizon...Can you tell me a place where I can get more info about it ?
Using the Schwarzschild formula, a photon becomes a black hole when its wavelength is ~5 Planck-Lengths (the far end of the electromagnetic spectrum). If a light beam was circularly polarized before becoming such a photonic black hole, would it ultimately become a naked singularity zipping along at the speed of light?
You have raised the interesting characteristics of black holes. Thank You for this content as well as for an informative description of the video written below, which I found clarifying and supportive. I am looking forward for your next mini-lectures, pls do not fear to analyze different points of view of various scientists and suggest or maybe comment on some valuable bibliography on the themes You are going to discuss that are a part of the newest discoveries in astrophysics. Lots of greetings to You. :)
is the particle inside the Ergosphere really moving or is it just riding along with the twisting space? That is, is the particle stationary to the space being twisted by the rotating black hole?
if the particle was static at the static limit for an outer observer, then it becomes static for an inner observer, but not anymore for the outer observer, that's because the inner observer is rotating along with the Black Hole, and so is the particle, while the outer observer is far enough to not experience the frame dragging at alln and like he said in the video, to observe the particle being static again, you must rotate along with the Black Hole too.
It can't. All null geodesics, that are the paths light rays take through spacetime, will converge at the ring-shaped singularity in case of a Kerr blackhole.
@@chinmaykrishna6485 What is a null geodesic? Is the light from the part of the accretion disk behind the black hole following a null geodesic? That light gets bent 180 over the top of the BH like when I brush the hair at the back of my head over my bald spot to hide it. Or is a null geodesic like a spiral that gets smaller & smaller?
If inside a rotating black hole we have a ringularity, could a particle get INSIDE that ringularity? What might happen there? Would there be any gravity? Would the particle be compressed?
Yes. The angular momentum of a black hole is the angular momentum of whatever object collapsed to form it. Astronomically, these are most usually stars, or multiples of them. From the mass of the black hole, we know the mass of the star(s) that collapsed to form it, as both mass and angular momentum are 'conserved' - they can't go away; they have to appear in some form after a change in the object having them. So just look at the spin-rate of stars of about the same mass, and you'll have a good idea of the rate of spin.
This is good, but presumably one could have slightly different interpretations and points of view about these things. So it would be nice to cite your sources.
Ooommmggg plzz m ugh frear is naked singularity , plz do a video about it And the charge of a black hole i have a problem plz helpe me , look light is made of electromagnetic waves so light can not escape the event horizon , so how can a black hole have a charge i mean it must be a source of charge and inside the event horizon there is no continuity of the electric field i mean the space time is curved and sucked to the singularity , idk if you understand me , i hope you understand , thank you , i love your channel i have subscribed immediately 🤩😍
I have, since this video came out, seen reports of a naked singularity observed. However, it being popular press, I'd prefer a scientific take. Obviously, from the info in this video, it must rotate close to the theoretical limit. I would expect the accretion disk to block clear vision, but universe has been surprising lately.
Parth brother, light is massless, and black holes having gravitational forces which can only suck those things which posses mass. So is it correct to say that black holes sucks light or what u said that it can't come out from it.. endorsing the fact that light is massless and there should be no effect of black hole gravitational force on it.. what u gonna say about this??
Stating that light gets sucked into a black hole probably gives you a mental image of light getting sucked into something like this 🕳 and not being able to escape. Ok, so what’s the issue? Well, that imagery is incorrect and so is the claim to a certain extent. Why? Because since light doesn’t have mass it cannot be sucked into anything, but space can, and since light must travel through the fabric of space time and black holes bend, twist, and distort space, light follows a straight path and rides space into the black hole. The implications are astonishing.
@@kingwillie206 black holes can bend light I know buddy, but my question is how light can not escape from the black holes as it is claimed by many astrophysicsts. Secondly, on what evidental basis u r claiming that 'SPACE CAN'?? Also Im well aware about the imagery and the actual black hole concept. How its gravitational pull can affect a massless photon and saying it can not escpae? It was always practically claimed that only the particles who have mass can only be infulenced by the gravitational effect. Thirdly the spacetime fabric as everybody is visualising is also not true as spacetime is 4 dimesnsional and it is not easy to visualise 4 dimensional thing, also we have no clue till yet that of what spacetime thing is made of....
@@ashutoshbhardwaj3392 - Again, it isn’t the light being pulled in directly, it is the space in which the light is traveling. And yes, a 4th dimension of time is difficult for some to envision, however, it is explained quite well by relatively.
@@kingwillie206 so why there is so called claim that "even light can't come out from the black hole if it enters into it after crossing event horizon?? If it would have been travelling in space and as per the known fact that, blackhole curve space time is curved to small upto a infintesimal small singularity.. then light travrl through black hole and comes out of it theoretically... As practically we dont know yet whats inside the blackhole and thus do Universe governing law applied inside it or not. Secondly Einstin feild equations are capable enough to explain the curvature of space using Ricci Tensor. I was only saying that it not possible to visualize it by some sort of artistic drawing.
You said kerr metric is describing is only describing the outer regions of the Black Hole but then you say that it describes singularity as well . So does that imply that we only think that ringularity exists but there is no proof.
Exactly - if we extend the mathematics to inside the black hole, it tells us there should be an inner horizon as well as a ring singularity. But this is only speculation because (1) we have no way of knowing at the moment, and (2) the Kerr metric only really works for the vacuum around a black hole.
yeah astrophysical black holes are all spinning (astrophysical is just a synonim for "real" in this case), but even studying solutions that don't appear to be physical, the Schwarzschild one for example, can be useful for our understanding of these very extreme objects and General Relativity
The energy tensor of vaccum in Kerr manifold is not zero. Detail in '81. Contracted Bianchi Identities and Energy Tensor'. on this website: sites.google.com/view/physics-news/home/updates
Like the topics but the explanation is too brief. You need to explain more about the metric and give some examples maby take mincovski metric how it discribes space time
Can we assume that black holes are STAR made of ANTI-MATTER Material? And can this answer any question related current physics, not taking account that the singularity exists.
Black Holes are already well explained with just the use of regular matter. I'm not saying you can't have anti-matter Black Holes, the problem is that it's not been directly observed yet
Hi friends, thanks so much for watching! Please feel free to subscribe, and check out my video on the Schwarzschild (stationary black hole) metric here: ruclips.net/video/ci06S-jNn8U/видео.html
hello sir do you know a database for angular momentum of AGN's. i need it for my extended essay and i have searched the entire internet and could not find a database with angular momentum of the AGN and the galaxy that they are in.
i am sorry but now i just have to beg for databases from people.
I still need to figure out how do i measure it's size (Unless it's just an Oblate spheroid in that matter), or how do i connect that property with the radius equation of a KBH
I am not a theoretical physicist. But I really like your videos--the contents and presentation.
Fine work!
Thank you so much! :)
👍🏾 Go study physics please, we need more interested minds in the field! 👍🏾
You should make a video on Cosmic Censorship Hypothesis
Because its your fault that you got me interested in it 😅😆
Yeah actually that's very interesting...😃
Definitely my plan! It's such an interesting idea :)
@@ParthGChannel waiting for it !
@@ParthGChannelIs it uploaded already?
Fabulous, you explain things so clear and concise; you dumb it down enough for me to understand perfectly. I can't wait to see more of your videos on blackholes.
Awesome video. love your videos keep them coming
This is the best video on the internet that explains Kerr's black holes. Thanks ❤
First time got to truly understand about kerr blackhole
Love from India 🇮🇳
RUclips recommendations have brought me to this GEM of a video!
Thanku for giving us beautiful physics knowledge, Thanku very much
Wow, thank the algorithm I just found your channel! Awesome
We are waiting for the next one!!! Thanks for doing videos like this!!!
im starting research on black holes this summer and watched this when i was getting too confused in the book im reading. perfect explanation great visuals thank u so much :)
Parth, I like your channel, I just subscribed. Expect more juicy videos.
Love your videos ❤️
Wwtched the whole video very interesting video
Amazing video! Thanks!
I'm sure you understand there are people, me in particular, who have no know idea what a black hole is, let alone describe it to someone, except a two year old human......lol, so thank you for sharing what you know as clear as you , so well do, to this seventy year old human
I liked your video before even watching it Your Videos Are REALLY AWESOME!!! You explain THINGS FOR EVERYONE!!!!!
Hey Parth your videos are so enjoyable to watch and thanks for making them ❤relative density
You're simply great man!!!!!Waiting for your next B.H video✌✌
Woohoo black hole series
Can't wait for all of them.
pls make video on dirac's eqn
❤thank you very much publisher
First question. My understanding is that for electrons to have the size currently assumed, the out part of the electron must be moving faster than the speed of light. Might the Kerr equation also apply to electrons and that they they are disks as well?
Second question. When two black holes merge, presumably they must be rotating in the opposite direction to accommodate the frame dragging. If they also have charge then the merger must be pole to pole?
Third question. How do black holes dump heat or is the heat they absorb/generate converted into mass?
hi, I can only partially answer your first question: I've never read anywhere this fact about the electron, and I don't know if it's true, but what I can tell you is that unfortunately for now, General Relativity doesn't deal with the microscopic world at all, so you can't really use it to predict the features of the electron. Sorry for the likely disappointment, but that's the limit of the theory
COULD YOU PLZ MAKE A VIDEO OF THE LAST MAXWELL EQUATION AS PEOPLE LOVED THE SERIES AND I THINK YOU SHOULD FINISH IT AS WELL.
(there are no good videos of 4th maxwell equation on youtube😅😅)
@parthg
I also want it!!
Thank you! Yes that is definitely my plan at some point, just not sure when I will finally be able to do it :)
"Does Santa get all his lumps of Cole from the North Pole of a Black Hole?"
-Nerdy Dr. Seuss
your Chanel is unique❣😀
Could you make a video on the solutions of the Schrordinger Equation?
thank you
the notification bell never fails me.
Absolutely!
you are the best .Thanks from morocco!
Yes sir pls do vdos on these topics!
This raises many questions, what is the angular momentum of the blackhole, does the photon orbit the blackhole at the same angular speed as the blackhole?
You are great.
Hi,
Nice video!🥳
I was wondering, If I wanted to study physics (or natural sciences) would I need to be able to code?
Thanks!😁
Classy content 💝
Add more videos in this series pls
Would not all black holes rotate as the mass collapsed into the center?
Hi can you explain feild equations??🤗🤗
Could you please briefly explain about Kerr metric, like how can we obtain this equation?
Based on this presentation, does it possible that the rotating blackhole is moving much faster than the speed of a photon since a photon needs to move at the same direction with the rotating blackhole?
By the way, nice presentation, as always.
Nope, sorry I realise that was not clear. The photon only needs to move in the same direction as the rotation of the black hole, but the black hole (or specifically its event horizon) does not need to move with the same speed as the photon. Thanks for watching as always :)
@@ParthGChannel I see. I was just wondering how this rotating black hole affects or changes the direction of the incoming photon. I am just curious since I don't have advanced knowledge about this. This is a very cool topic 😁😁.
I came to this video mainly because I wanted to know about outer and inner even horizon but i didn't understand much about the inner event horizon...Can you tell me a place where I can get more info about it ?
Using the Schwarzschild formula, a photon becomes a black hole when its wavelength is ~5 Planck-Lengths (the far end of the electromagnetic spectrum). If a light beam was circularly polarized before becoming such a photonic black hole, would it ultimately become a naked singularity zipping along at the speed of light?
You have raised the interesting characteristics of black holes. Thank You for this content as well as for an informative description of the video written below, which I found clarifying and supportive. I am looking forward for your next mini-lectures, pls do not fear to analyze different points of view of various scientists and suggest or maybe comment on some valuable bibliography on the themes You are going to discuss that are a part of the newest discoveries in astrophysics. Lots of greetings to You. :)
Roy Kerr 2023: "if a theory predicts singularity, then the theory is false"
Amazing ❤️
please make a video about lasers and coherence :)
is the particle inside the Ergosphere really moving or is it just riding along with the twisting space? That is, is the particle stationary to the space being twisted by the rotating black hole?
if the particle was static at the static limit for an outer observer, then it becomes static for an inner observer, but not anymore for the outer observer, that's because the inner observer is rotating along with the Black Hole, and so is the particle, while the outer observer is far enough to not experience the frame dragging at alln and like he said in the video, to observe the particle being static again, you must rotate along with the Black Hole too.
Why so underrated?
Hey Parth ,what would happen if a light ray passes via the centre of the ringularity
It can't. All null geodesics, that are the paths light rays take through spacetime, will converge at the ring-shaped singularity in case of a Kerr blackhole.
I don't really understand what you said but
Wouldn't the light pass via the middle , the gravitational pull will be 0 in the centre of the ring.
@@chinmaykrishna6485 What is a null geodesic? Is the light from the part of the accretion disk behind the black hole following a null geodesic? That light gets bent 180 over the top of the BH like when I brush the hair at the back of my head over my bald spot to hide it. Or is a null geodesic like a spiral that gets smaller & smaller?
Could you tell me if there is any scholarships for studying in Cambridge?
I actually want to be physicist
If inside a rotating black hole we have a ringularity, could a particle get INSIDE that ringularity? What might happen there? Would there be any gravity? Would the particle be compressed?
Hey Parth, can we calculate somehow the average angular speed of the black hole?
Yes. The angular momentum of a black hole is the angular momentum of whatever object collapsed to form it. Astronomically, these are most usually stars, or multiples of them. From the mass of the black hole, we know the mass of the star(s) that collapsed to form it, as both mass and angular momentum are 'conserved' - they can't go away; they have to appear in some form after a change in the object having them. So just look at the spin-rate of stars of about the same mass, and you'll have a good idea of the rate of spin.
1:47
What about the Rystrom Norstrom metric?
Could you give me the derivations of the Maxwell equations?
Electrons also have spin, charge and mass and have zero size are electrons naked singularities?
How do we know that a blackhole is rotating or not ??
@Parth G, I'd certainly love know more about why indeed "The God abhors these naked singularities"
One ring to rule them all...
This is good, but presumably one could have slightly different interpretations and points of view about these things. So it would be nice to cite your sources.
Means if naked singularity is attained then there are chances for wormholes formation
I really love watching your videos and pretending like I know what the fuck you’re talking about. Great channel!
Ooommmggg plzz m ugh frear is naked singularity , plz do a video about it
And the charge of a black hole i have a problem plz helpe me , look light is made of electromagnetic waves so light can not escape the event horizon , so how can a black hole have a charge i mean it must be a source of charge and inside the event horizon there is no continuity of the electric field i mean the space time is curved and sucked to the singularity , idk if you understand me , i hope you understand , thank you , i love your channel i have subscribed immediately 🤩😍
I have, since this video came out, seen reports of a naked singularity observed. However, it being popular press, I'd prefer a scientific take. Obviously, from the info in this video, it must rotate close to the theoretical limit. I would expect the accretion disk to block clear vision, but universe has been surprising lately.
it's even argued to not be a physical solution so no, nobody observed naked singularitites. For now ;)
I just call the spinning black holes singularity a “ringularity” :o
Parth brother, light is massless, and black holes having gravitational forces which can only suck those things which posses mass. So is it correct to say that black holes sucks light or what u said that it can't come out from it.. endorsing the fact that light is massless and there should be no effect of black hole gravitational force on it.. what u gonna say about this??
Stating that light gets sucked into a black hole probably gives you a mental image of light getting sucked into something like this 🕳 and not being able to escape. Ok, so what’s the issue? Well, that imagery is incorrect and so is the claim to a certain extent. Why? Because since light doesn’t have mass it cannot be sucked into anything, but space can, and since light must travel through the fabric of space time and black holes bend, twist, and distort space, light follows a straight path and rides space into the black hole. The implications are astonishing.
@@kingwillie206 black holes can bend light I know buddy, but my question is how light can not escape from the black holes as it is claimed by many astrophysicsts. Secondly, on what evidental basis u r claiming that 'SPACE CAN'?? Also Im well aware about the imagery and the actual black hole concept. How its gravitational pull can affect a massless photon and saying it can not escpae? It was always practically claimed that only the particles who have mass can only be infulenced by the gravitational effect. Thirdly the spacetime fabric as everybody is visualising is also not true as spacetime is 4 dimesnsional and it is not easy to visualise 4 dimensional thing, also we have no clue till yet that of what spacetime thing is made of....
@@ashutoshbhardwaj3392 - Again, it isn’t the light being pulled in directly, it is the space in which the light is traveling. And yes, a 4th dimension of time is difficult for some to envision, however, it is explained quite well by relatively.
@@kingwillie206 so why there is so called claim that "even light can't come out from the black hole if it enters into it after crossing event horizon?? If it would have been travelling in space and as per the known fact that, blackhole curve space time is curved to small upto a infintesimal small singularity.. then light travrl through black hole and comes out of it theoretically... As practically we dont know yet whats inside the blackhole and thus do Universe governing law applied inside it or not.
Secondly Einstin feild equations are capable enough to explain the curvature of space using Ricci Tensor. I was only saying that it not possible to visualize it by some sort of artistic drawing.
You said kerr metric is describing is only describing the outer regions of the Black Hole but then you say that it describes singularity as well . So does that imply that we only think that ringularity exists but there is no proof.
yup
Yeah!
Exactly - if we extend the mathematics to inside the black hole, it tells us there should be an inner horizon as well as a ring singularity. But this is only speculation because (1) we have no way of knowing at the moment, and (2) the Kerr metric only really works for the vacuum around a black hole.
@@ParthGChannel thanks for the clarification .
I like it when the content creators clarify the doubts .
^_^
"It's Been Exactly One Year Since the First Case of COVID Was Found in China"
And now I'm thinking Physics...
Thinking about ...
What..
Guess?
what?
In reality, are there actually any back holes that are not spinning? Doesn't everything spin at least a little bit? :D
yeah astrophysical black holes are all spinning (astrophysical is just a synonim for "real" in this case), but even studying solutions that don't appear to be physical, the Schwarzschild one for example, can be useful for our understanding of these very extreme objects and General Relativity
How did Ramanujan solve the Strand
Cómo lo simularia?
👌👍
If only I had you when I studied physics I wouldnt have changed to engineering in master's.
this is interesting but what is that on your head?
Pi is the naked singularity of this whole holy holoversal hole.
I just saw this video and I was like," Whoa!"
Thanks for watching! :)
The energy tensor of vaccum in Kerr manifold is not zero.
Detail in '81. Contracted Bianchi Identities and Energy Tensor'. on this website:
sites.google.com/view/physics-news/home/updates
I believe there was a naked singularity in my morning coffee
Like the topics but the explanation is too brief. You need to explain more about the metric and give some examples maby take mincovski metric how it discribes space time
I think there's another sphere known as photon sphere
Jamal N. Islam
You are a moderator in Saint Louis chess academy?
The inner horizon of a black hole is where all the interesting physics are happening.
Inadequate.
Thanks for watching!
Bro ur hair😂
I’m inlove with you
Comment for engagement
Thanks :D
Imaginary number are where occurred in real life ???it's causing bubble in the cavitation form in siphoning 😀😀😃😃😃😃😀😃
😚😚😚
I'm sorry, I wasn't listening. Did you say Kermit trick?
I would love to do physics in uni but your videos scare me 😆
Can we assume that black holes are STAR made of ANTI-MATTER Material? And can this answer any question related current physics, not taking account that the singularity exists.
Black Holes are already well explained with just the use of regular matter. I'm not saying you can't have anti-matter Black Holes, the problem is that it's not been directly observed yet
Bro make time and come live.
Pls make video on dirac eqn