How to Understand the Black Hole Image

  • Δημοσιεύτηκε στις Πριν 8 μήνες

    VeritasiumVeritasium

    διάρκεια: 9:19

    We have just seen the first image of a black hole, the supermassive black hole in the galaxy M87 with a mass 6.5 billion times that of our sun. But what is that image really showing us?
    This is an awesome paper on the topic by J.P. Luminet:
    Image of a spherical black hole with thin accretion disk
    Astronomy and Astrophysics, vol. 75, no. 1-2, May 1979, p. 228-235
    ve42.co/luminet
    Using my every day intuition I wondered: will we see the "shadow" of the black hole even if we're looking edge on at the accretion disk? The answer is yes because the black hole warps space-time, so even if we wouldn't normally be able to see the back of the accretion disk, we can in this case because its light is bent up and over the black hole. Similarly we can see light from the bottom of the back of the accretion disk because it's bent under the bottom of the black hole. Plus there are additional images from light that does a half turn around the black hole leading to the inner rings.
    What about the black hole "shadow" itself? Well initially I thought it can't be an image of the event horizon because it's so much bigger (2.6 times bigger). But if you trace back the rays, you find that for every point in the shadow, there is a corresponding ray that traces back to the event horizon. So in fact from our one observing location, we see all sides of the event horizon simultaneously! In fact infinitely many of these images, accounting for the virtually infinite number of times a photon can orbit the black hole before falling in. The edge of the shadow is due to the photon sphere - the radius at which light goes around in closed orbits. If a light ray coming in at an oblique angle just skims the photon sphere and then travels on to our telescopes, that is the closest 'impact parameter' possible, and it occurs at sqrt(27)/2*r_s
    Huge thanks to:
    Prof. Geraint Lewis
    University of Sydney ve42.co/gfl
    Like him, I'm hoping (predicting?) we'll see some moving images of black holes tomorrow
    Prof. Rana Adhikari
    Caltech ve42.co/Rana
    Riccardo Antonelli - for excellent images of black holes, simulations and ray-tracing code, check out:
    ve42.co/rantonels
    The Event Horizon Telescope Collaboration
    Check out their resources and get your local link for the livestream here: ve42.co/EHT
    Special thanks to Patreon supporters:
    Donal Botkin, Michael Krugman, Ron Neal, Stan Presolski, Terrance Shepherd, Penward Rhyme
    Filming by Raquel Nuno
    Animation by Maria Raykova

Veritasium
Veritasium

OK, just over an hour to go! This is the link to the Washington DC National Science Foundation livestream: https://ve42.co/NSFstream Click here for links to other live streams (there are several available in different countries): https://ve42.co/EHTstream

Πριν 8 μήνες
Pradeep Yadav
Pradeep Yadav

@Rayagoldendropofsun Sunlightelectrorays nothing is trapped in a solid if you heat it the whol solid will get converted to vapour or react with air to form other gaseous compound

Πριν μήνα
Pradeep Yadav
Pradeep Yadav

@Rayagoldendropofsun Sunlightelectrorays nonsense it's not the way you mention actually water molecules in cloud do not get separated as hydrogen and oxygen they remain in h2o form in vapour state they can only be separated by electrolysis or similar kind of method in which energy is required which is much larger than that is used to convert it into vapour state

Πριν μήνα
Rayagoldendropofsun Sunlightelectrorays
Rayagoldendropofsun Sunlightelectrorays

Pradeep Yadav - Credence clear water revival is a super fine music band with a mega hit song: "Have U ever seen the rain coming down" ? If U did, U have in live motion experienced a physical act of Gravity being DEBUNKED . Water/ rain falling downward was once atmospheric gases roaming free oxygen and hydrogen, but when trapped together making water they lost their motion and falls downward, as another song goes, "raindrops keep falling on my head". Whenever rising atmospheric gases oxygen and hydrogen bonds together making water, which is a state of solid motionless mass, they fall downward as RAINDROPS from lost it's gaseous molecular motion. This shows downward falling motion has nothing to do with Gravity. The factual cause, and rightful owner of downward falling motion is TRAPPED GAS MOLECULES/ GAS BONDING. This is a simple physical fact visible to the naked eyes, unlike Newton's and Einstein's mythical theories so complex they themselves don't believe it. Another way to put it. Solid objects on fire releases trapped gas molecules with new life in rising motion upwards into the atmosphere as gas smoke visible to the naked eyes ! Those gas smoke/ gas molecules was once trapped within that solid objects keeping it grounded. All solid object stays surface grounded because of its motionless trapped gas molecules, which are connected to the earth ENERGY CONSERVATION SYSTEM by way of its Electrons, including us humans. This is grade school science, and should be easily understood. "Where is the gas molecules in a solid". Strange U ask this question when it's clearly stated in that post saying, GAS BONDING the making of solid objects. The universe is made of gas molecules, so is earth and it's solid objects ! Einstein Gravitational equations is a concepts of math and not physics, if it is, bring me a physical connection to the physical universe, same as the mechanism of GAS BONDING is physically connected as a see and touch part of the wider universe.

Πριν μήνα
Pradeep Yadav
Pradeep Yadav

@Rayagoldendropofsun Sunlightelectrorays why would gas molecules go up why not it goes down and what is weight can you explain based on your theory ???? Stars motion ??? Etc the current theory of gravity has the answers and these things can be explained by Einstein gravitational theory but what you propose sounds absurd to me it doesn't make sense and you are not able to explain clearly what you are trying to say

Πριν μήνα
AbhiJeet Pawar
AbhiJeet Pawar

Hello Sir, You said light rays will reflect back outside 2.6R Till what radius light rays will bend or reflect back? Which minimum radius will be unaffected from black holes gravity?

Πριν 10 ώρες
iwanabana
iwanabana

Derek, what about the other simulations of the picture? Isn't this one that got picked purely cherry-picking from the data to fit most closely to what scientists "think" is right?

Πριν 15 ώρες
Om Gopal Mishra
Om Gopal Mishra

I don't know much about black hole so i have doubts. What exactly is it ? A concentrated blob of mass ? And morever does high mass bends space-time ?

Πριν 21 ώρα
Chris Bibes
Chris Bibes

This is the best explanation of ‘’Gravitational Lensing” Thank you so much for sharing this video...🔥🔥🔥

Πριν ημέρα
Lil RouLis
Lil RouLis

Light cant escape from a black hole So if u could see a black hole, u would see "The Nothing"?

Πριν ημέρα
Mr Pickle
Mr Pickle

0:29 hehe

Πριν 2 ημέρες
Yours Truely
Yours Truely

Its not a photo its a radio cgi. No pixels involved.. Vlbi.. Radio telescopes.. They won a prize... Fundrazing.

Πριν 2 ημέρες
N E W
N E W

I did not understand a single word you said as you are too elony

Πριν 3 ημέρες
PLAYER X
PLAYER X

Omg you got it right

Πριν 3 ημέρες
Ven Vex
Ven Vex

Then how come Quasars are spitting out light?

Πριν 3 ημέρες
Souvik Dutta
Souvik Dutta

wow

Πριν 5 ημέρες
John De Jong
John De Jong

My questions are : If the material and gases within the secretion disk move with a substantial part of the speed of light being milions of degrees hot and' it leaves the edge of the secretiondisk into the black hole 1. Why does it become invisable? 2. If it travels so fast what within the black hole puts a end to it's increable speed. 3. Does te speed of the material and gases increase if it moves towards the centre.

Πριν 5 ημέρες
John De Jong
John De Jong

@Thomas Kundera that is correct however onely when it pases the eventhorizon but ther is a lot of space between the inner adge of the secretion disc and the eventhorizon of the black hole.

Πριν 4 ημέρες
Thomas Kundera
Thomas Kundera

When the matter pass the horizon, you can't see it anymore: no light will ever go out.

Πριν 4 ημέρες
Nick Venture
Nick Venture

Does the view of a black hole always look the same no matter your orientation bc of how it bends light around it? Still trying to wrap my head around a 2d object in a 3d space..

Πριν 5 ημέρες
Kevin Anthony
Kevin Anthony

Lol...the "gravity" of the situation...

Πριν 5 ημέρες
Mimoh Joshi
Mimoh Joshi

That was truly amazing.. it's crystal clear right now !!

Πριν 6 ημέρες
Kobil Shakur
Kobil Shakur

1.5 SSR? Wouldn't it be like just outside of it?

Πριν 6 ημέρες
K Z
K Z

Minf*ed and I love it!🤩

Πριν 7 ημέρες
Gambit
Gambit

fail lol

Πριν 7 ημέρες
RobertsMrtn
RobertsMrtn

This is based on the assumption that the so-called Accretion disk exists. It could be a sphear of objects orbiting the large mass and not a disk. I would also like to point out that this image does not prove the existence of so-called Black Holes. It shows only that there is a large mass present which is bending light in this way. I have good reason to be skeptical about these things. Please message me for more information.

Πριν 7 ημέρες
Thomas Kundera
Thomas Kundera

@RobertsMrtn : _"Annalen der Physik"_ is one thing, _"Annals of Mathematics and Physics"_ only popped me some "PeerTechz" stuff. But you are right: I couldn't be referee in any of them.

Πριν ημέρα
RobertsMrtn
RobertsMrtn

@Thomas Kundera Annals of Mathematics and Physics is the journal Einstien used. Can you list the papers you have written and journals you have used before you poke fun of others?

Πριν ημέρα
Thomas Kundera
Thomas Kundera

@RobertsMrtn : Why did you had to publish in a scam journal? None of the regular ones would accept your work?

Πριν 2 ημέρες
RobertsMrtn
RobertsMrtn

@Thomas Kundera I had it on yumpu.com but the journal asked me to delete it because it was being picked up by their plagiarism checks. I can give you the gist of what the paper is about. It uses the Equivalence Principle developed by Einstien to drive formulas relating time dilation and acceleration due to gravity. It concludes that it is not possible to slow the propagation of light to zero with gravitational fields.

Πριν 3 ημέρες
Thomas Kundera
Thomas Kundera

@RobertsMrtn : [repost] It's not already in preprint on arxiv or something?

Πριν 3 ημέρες
Arpad Farkas
Arpad Farkas

Most likely many people before me realized this, but I truly am amazed by that in theory, by looking at a black hole, we could see the past of our own planet. I guess that that is not too probable, since we are not stacionary, to be in the way of the returning photons, wich started their journey a couple million years ago from Earth...

Πριν 7 ημέρες
phail89
phail89

You just blew my mind like 2 or 3 times in one video 😂 haha

Πριν 8 ημέρες
Brent Caldwell
Brent Caldwell

0:32 - the GRAVITY of the situation you say? 🤣😉

Πριν 8 ημέρες
Fox Dylan
Fox Dylan

Came here from Joe Scott, looking to be mesmerised

Πριν 8 ημέρες
Aspartame Is Healthy
Aspartame Is Healthy

Thank you, this is explained so clearly, especially with visuals.

Πριν 9 ημέρες
Nirmal kumar
Nirmal kumar

U cleared my doubts tq u

Πριν 9 ημέρες
Professor Davidson Viana
Professor Davidson Viana

O conteúdo deste canal é excelente! Fiz um vídeo bem simples sobre o assunto que gostaria da apreciação dos interessados: https://youtu.be/SiUcEADOG2c Sou doutor em Física e estou iniciando timidamente um canal com a proposta de mostrar que com materiais de baixo custo (ou nenhum) podemos entender conceitos chave da ciência atual entre outros temas variados. Quem quiser apoiar, inscreva-se neste canal/perfil (professor Davidson Viana) e me sigam também no instagram @vianadavidson. Serei humildemente grato pelo apoio e farei por merecer cada inscrito com bastante trabalho! Abraços!

Πριν 10 ημέρες
Prabin Paudel
Prabin Paudel

See you in few months or year perhaps, as youtube commands, again.😌

Πριν 10 ημέρες
Chrissen Gemmill
Chrissen Gemmill

Why are they not called black balls? no, seriously...

Πριν 10 ημέρες
vikas srivastava
vikas srivastava

I have a couple of questions - 1. Why is that part of the of accretion disc not visible which is diametrically across the black hole. 2. Why is imaging of black hole at center of our galaxy more difficult that imaging the M87 black hole.

Πριν 12 ημέρες

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