Naked Science Forum
General Science => General Science => Topic started by: scientist@work on 03/03/2021 18:55:10
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Has anybody yet found out what a black hole is
and how it works?
It's not like the Bermuda triangle, where things disappear, or yes?
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A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
P.S. - 👍
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A black hole is an area of space-time where gravity is so strong that nothing - no particles or even electromagnetic radiation like light - can escape from it. The theory of general relativity predicts that a sufficiently compact mass can distort space-time to form a black hole.
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A black hole is an area of space-time where gravity is so strong that nothing - no particles or even electromagnetic radiation like light - can escape from it. The theory of general relativity predicts that a sufficiently compact mass can distort space-time to form a black hole.
Looks like @Zer0 has been trolled by a weak attempt to spam us!
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Has anybody yet found out what a black hole is and how it works?
Yes, Einstein's equations of General Relativity give a very good description of what a black hole is.
- But solving these equations took decades!
- Roger Penrose won a Nobel Prize in 2020 for showing that black holes are actually capable of forming (and almost certain to form) when a large star reaches the end of its life.
If you try to look very closely at a black hole, the equations blow up at the central singularity
- And if you try to peer very closely at the event horizon (on the quantum scale), you also end up in some conflicts with quantum theory
So, provided you don't try to examine a black hole too closely (with a microscope), we have quite a good description of what they are and how they work.
Wikipedia (and the references section down the bottom) will give you more information than you could possibly want: https://en.wikipedia.org/wiki/Black_hole
It's not like the Bermuda triangle, where things disappear, or yes?
Things do disappear into black holes, but they tend to leave a lot of "splatter" when the black hole tears them apart.
- Anything swallowed leaves its mark in the mass of the black hole
Unlike the Bermuda Triangle, we can actually see black holes swallowing stuff, in the accretion disk at the center of distant galaxies.
(And maybe I've been trolled too...)
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🙄
ummmm... I'm being Trolled?
🤔
Like i got a fan now?
😊
I'm being followed by fans?
I'm a Celeb & RockStar eh?
👻
Hiyaaa @smithsera88
🙃
U gonna be my echo voice from now onn?
P.S. - HeeY!
U forgot to echo my PS!
☹️
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One of the reasons that QM does not fit with general relativity is the information paradox. This involves the loss of quantum states. Many states can devolve into the same state. The wave equation should, in principle, be able to determine the state of a system at any point in time if the initial state is known. This is violated when things fall into the black hole. Information is no longer available to determine a systems state. This is information loss.
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Hey there!
Since the others already gave a good definition of what a black hole is, I won't repeat that. Regarding your question if things "disappear" like in the bermuda triangle - yes they do in a way. Due to gravity and the mass of a blackhole it is attracting and "sucking" surrounding things in. This causes a lot of objects to be "shred" before getting swallowed. For example if a star is passing too close to a supermassive black hole it can be shred into streamers. In conclusion - things do disappear but not like in the bermuda triangle.
Greetings :)
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Has anybody yet found out what a black hole is
and how it works?
It's not like the Bermuda triangle, where things disappear, or yes?
WLooks like @Zer0 has been trolled by a weak attempt to spam us!
A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.[1] The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.[2][3
Also from wikipedia
https://en.m.wikipedia.org/wiki/Neutron_star#:~:text=A%20neutron%20star%20is%20the,star%20was%20especially%20metal-rich.
Basically matter that is very very dense, thus its gravity at the surface is far greater than something of far greater mass yet less dense.
Betelgeuse is a far larger star than the sun yet its mass is not comparably great, so its density is lower and surface gravity is less. Conversely something incredibly dense has very high gravity.
Very high gravity apparently deforms the fabric of spacetime causing it to collapse, but then again we can't see what's happening 'cause the light gets sucked in.
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Has anybody yet found out what a black hole is
and how it works?
It's not like the Bermuda triangle, where things disappear, or yes?
Here is a straightforward explanation on youtube Kurzgesagt – In a Nutshell
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It is an area in space where gravity is so strong that even light with a speed of 3*10^8 m/s cannot escape.
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A Black Hole ain't Black Nor a Hole.
Absence of Light does Not define the colour Black.
A Hole defines an empty cavity whereas a BH is stuffed with Mass.
Things Do Not Disappear inside a Black Hole, when a Smaller BH joins in with a Bigger BH, the Combined Size & Mass of the BH Increases.
Light is Unaffected by Gravity, Photons are Massless.
Reason being Light cannot escape Out of a BH is fabric of Space-Time is Curved & Twisted.
P.S. - Good thing bout Science, it's True, whether or not you believe in it.
Neil deGrasse Tyson
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Light is Unaffected by Gravity
That's not true: https://en.wikipedia.org/wiki/Gravitational_lens
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@Kryptid
Yes!
I Understand your point.
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But Time & Again, i keep Struggling with this.
😑
Allow me an explanation as it is a bit relevant on the subject matter in concern...
As usual, i was surfing the internet reading up things...
🧐
Was checking on
" Principles of Light ".
Came across a webpage withholding relevant information..
https://www.thenakedscientists.com/articles/questions/how-can-light-bend
Read thru it thrice...but wasn't convinced with the Explaining of the phenomenon.
🤔
Saw the page had a comments section below..it didn't require to punch in an email id..hence simply commented.
Revisited, did Not receive any clarifications or responses..
👎
Thought for a while, then visited the Forum.. Instantaneously Liked what i saw..it seemed Humane!
😋
Was Really Not convinced as to whether i should Register...
🤔
For heaven's sake, it was named TheNakedScientists !!!
🤭
(Very Very Glad Now that i Did)
🙃
And as usually it happens with a few of Us, we step out to buy a single product...
Enter the supermarket & end up buying ten different things..
Only to return home n realize, We did not buy the stuff which we originally had step outside for...pfft!
☹️
(I got distracted by a QOTW on Squatting Flies, yeaah!)
😔
Over the span of three years, thrice Respected Members of the Forum have Corrected me on this same phenomenon.
👍
I was provided detailed explanations three times, but for some goddamn reason unknown to me, i always snap back out of it n find myself on the same starting point.
👎
GraviTea is perhaps Not my cuppa T!
☕
P.S. - I Really do Not wish to waste anybodys Time & Energy anymore on this Phenomenon.
I do Understand their explanations & get what they are saying, have said...
But, it does Not work out for long with me.
I've been struggling at this since the past three years.
😑
Perhaps...my brain Simply isn't capable enough of Understanding it.
🙏
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There are two different ways of looking at it. One is that space is distorted around massive objects and that light is simply travelling on a distorted path around that object. Another is that light has its own gravitational field generated by its energy, which in turn is attracted to the gravitational field of other objects like stars. This attraction causes its path to deflect as it travels near an object.
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@Kryptid
Yes!
You are Correct, once again.
👍
Past Detailed Explanations from Forum Seniors Directed me in that same Right path.
I learnt that even thou Photons are Massless, Still they have Alot of Momentum.(Immense Energy)
Energy & Mass are one & the same thing.(Interchangeable)
A Hot coffee mug is Heavier than an Identical Cold coffee mug.(Easy to Understand)
Protons made up of 3 Quarks...
Quarks amount to approximately 2% of the Mass..
Rest 98% comes from Immense Energetic Quark Momentum.(Perhaps)
I Learnt stuff because of You folks.
🙏
(Please Do correct me if I'm going astray or making incorrect statements)
But as Time progresses, the Silly Doubts just keep resurfacing...
Mainly coz of statements such as..
" Gravity is an Invisible Force ".
" The surface of the Earth is accelerating Upwards at
9.8 m/s/s ".
" At Exactly the Centre of the earth, Gravity is Zero ".
(Such statements not only recall Doubts, but end up multiplying them)
👎
P.S. - Oh! leave the Wise our measures to collate,
One thing is Certain, that Light has Weight.
One thing is Certain, and the rest debate,
Light rays when near the Sun, Do Not Go Straight!
🤍
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" Gravity is an Invisible Force ".
Well, it's not exactly visible.
" The surface of the Earth is accelerating Upwards at
9.8 m/s/s ".
That one isn't true. It sounds like a misunderstanding of the equivalence principle.
" At Exactly the Centre of the earth, Gravity is Zero ".
That's (more or less) true. It would be true inside of a perfect sphere, but the Earth isn't a perfect sphere. The reason for this is because the gravity of all of the sphere's material would be pulling on you in all directions at once, creating zero net force.
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@Kryptid
Hi!
😊
Yes, it's Not exactly Visible... I'll give you that.
🤭👍
(I get it, just like the Wind. Isn't visible either, but that doesn't mean it ain't there.)
Equivalence Principle...
A body at Rest in a Gravitational Field experiences the Effect.
Got it!
👍
(Quite remarkable, that a mere Rocket accelerating at 9.8 m/s/s can literally mimic the whole mass of the Earth & provide the same Effect)
Centre of the Earth.
Yes Indeed, at the very central point, " Assuming " equal mass distribution...
Half of the planet would be pulling in one way, while the other half, the other way...
Hence those forces would cancel out each other completely.
Very Easy to Understand.
👍
(Thou...Wonder what bout the Sun.
At the Exact centre point, if facing towards the Sun...there wouldn't be another Sun behind.
The Sun's Gravitational Field extends way beyond the Oort Cloud.
Maybe..just maybe, there ought to be a tiny miniscule effect of the gravitational pull of the Sun in the foreground, as there isn't another binary Sun in the background.
But ofcourse, for obvious reasons such Suppositions cannot be proved due to the immense challenge they pose inorder to test/experimentation.)
P.S. - Folks such as Me might suffer from narrowmindedness in thinking Heat is Not Real, just a measure of the rate of change of momentum of atoms buzzing faster or slower...
But wait till we eventually seat our bums in a hot frying pan!
🤭
(Once we feel it...then we'd Surely Understand, & learn to Respect it.)
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Black holes are one of the weirdest phenomena in the World. A black hole is a space-time area where gravity is so strong that nothing can escape. Light is sucked into it, thus the term 'black hole.' Since no light can get out of black holes, they're invisible. A space telescope with special equipment is needed to locate a black hole. It's a massive amount of stuff crammed into a minimal place.
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I'm proud to present this.
A black hole is the opposite of a white hole, and it doesn't work as much as it sux.
A white hole mostly blows.
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To understand it simply you can say it is an area where everything including light is pulled into it. You can image it as a giant vacuum cleaner. https://en.wikipedia.org/wiki/Black_hole
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Well,a black hole is an area of space-time where gravity.
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Well,a black hole is an area of space-time where gravity.
Yikes, that was an unfortunate first post!
If you click the blue rectangle that says 'actions' in your post at the top right and then click 'modify' in the drop down you can edit your post.
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Has anybody yet found out what a black hole is
and how it works?
It's not like the Bermuda triangle, where things disappear, or yes?
A black hole is an unknown, but that doesn't stop fools from knowing. Oh about every 5 years black holes become something new.
Also a black hole is a complete waste of time, as you will never know
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A black hole is an unknown, but that doesn't stop fools from knowing. Oh about every 5 years black holes become something new.
Also a black hole is a complete waste of time, as you will never know
What are you just trolling now trying to annoy?
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Has anybody yet found out what a black hole is
and how it works?
It's not like the Bermuda triangle, where things disappear, or yes?
A black hole is an unknown, but that doesn't stop fools from knowing. Oh about every 5 years black holes become something new.
Also a black hole is a complete waste of time, as you will never know
Please do not post incorrect information in the main sections of this forum. You will be considered to be trolling and will be banned.