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petrushkagoogol
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What makes black holes "black" and white holes "white" ?
Not quite, it means that light speed is slower than the escape velocity caused by gravity. Gravity is also radiating at the speed of light.Mary Space said:Hello
"Black holes" so called because the light that goes through it has a lower speed than the gravitational force of black holes that's why light can't get out of it, and we can't see it, so these holes called "black."
About the "white hole", as I know, the scientists they have not yet found, but according to the law of conservation of energy, this energy that enters a black hole should get out of the white hole, and if the light is in a black hole can not escape, the white hole It acts with a repulsive force, and we see a bright light that's why "white holes" so called.
I hope I could help you.
newjerseyrunner said:Not quite, it means that light speed is slower than the escape velocity caused by gravity. Gravity is also radiating at the speed of light
newjerseyrunner said:Black holes and white holes are not related. Energy going into a black hole simply gets stuck there and then radiated away as Hawking radiation. Black holes are not wormholes to white holes, they are simply inescapable gravity pits.
Chronos said:Not unheard of for wiki to spout unsupported bs such as this
The idea has been suggested before but as far as I know it's pure speculation.Garett Kutcher said:Is there any evidence [what would such evidence even look like] that the creation of a black hole is the 'big bang' of an new universe or is that just a pretty science fiction idea?
What makes you think it "keeps" drawing it deeper? It draws it to the center and that's it. Black holes are finite.Sue Rich said:If a black hole draws in everything within it's event horizon, and keeps drawing it deeper, does that mean the black hole is infinite?
phinds said:What makes you think it "keeps" drawing it deeper? It draws it to the center and that's it. Black holes are finite.
I know that.I am asking that without knowing the end how we can conclude black hole is finite?rootone said:The singularity is simply where the math breaks down and produces nonsense results.
It is NOT a description of a physical object.
We DON'T KNOW what physically is going on at the center of a back hole.
We do know that the infalling stuff is by this time no longer in the form of atoms, because atoms disintegrate before that point.
Neutron stars, (very massive objects which are not quite massive enough to be black holes), are known to exist by observation, and what we observe IS consistent with GR math.
The star has become mainly a soup of neutrons with other subatomic fragments mixed in.
Well strictly speaking we can't make any conclusions at all since we can't observe anything, we can't reproduce the conditions, and the best theory we so far have; GR, doesn't make sensible predictions.praveena said:... without knowing the end how we can conclude black hole is finite?
This is an illogical statement. Complete and infinite do not mean the same thing. For example: a set of all positive integers is an infinite set, but does not contain all numbers.rootone said:We do know that stuff (like us) exists externally to the black hole though, so in that sense it can't be infinite.
praveena said:How you are saying that black hole is finite?Is that singularity is the end??
Sue Rich said:\ I wonder why no one has ever tried to send a camera of some sort inside a black hole to actually see what happens before (or if) it's destroyed?.
What good would sending a camera in do? It can't come out again, nor can any information from it so what would be the point?Sue Rich said:That's mostly the theories I've read about, Praveena. I wonder why no one has ever tried to send a camera of some sort inside a black hole to actually see what happens before (or if) it's destroyed? Until we actually know what's inside, everything we say is nothing more than conjecture or speculation at this point.
Chronos said:Yet we observe phenomena in various parts of the universe that cannot be accounted for by any known physics aside from black holes. The same cannot be said for white holes.
Chronos said:You can't enclose anything infinite inside a finite volume.
Fervent Freyja said:The nearest black holes are thousands of light years away...
phinds said:What good would sending a camera in do? It can't come out again, nor can any information from it so what would be the point?
Also, the nearest known BH is tens of thousands of light years away so would take us hundreds thousands of thousands of years to get there.
There are other problems.
I don't think your camera idea works out too well.
Chronos said:The short answer is nothing exits a black hole and nothing enters a white hole.
No, party poopers who poop on crackpot sciencerollete said:Party poopers with no sense of humor.
I take it you know little about cosmology. It's an extraordinarily common term (in cosmology). Just for grins, I just Googled it. ALL of the two pages were referring to cosmological white holes and I'd be surprised if the next 10 were not as well. I think your sense that it is a biological term is a significantly minority view.I never heard of a 'white hole' beyond the biological realm before.
A black hole is a region in space where the gravitational pull is so strong that nothing, including light, can escape from it. It is formed when a massive star dies and its core collapses, creating a singularity with infinite density and zero volume.
Black holes cannot be directly observed, but their presence can be inferred through their effects on surrounding matter. Astronomers can detect the X-rays and radio waves emitted by matter as it is pulled into a black hole, or by observing the gravitational lensing caused by a black hole's immense gravity.
Once an object crosses the event horizon of a black hole, it is impossible for it to escape. This is because the gravity of the black hole is so strong that the escape velocity exceeds the speed of light. However, some theoretical models suggest that particles can escape from the black hole through Hawking radiation.
A white hole is a hypothetical region in space where matter and energy are constantly being ejected outwards. It is essentially the opposite of a black hole, where matter is being pulled inwards. White holes are not yet proven to exist, but they are predicted by some theories of general relativity.
There is no evidence to suggest that a black hole can turn into a white hole. In fact, the laws of physics suggest that a black hole will continue to exist and grow in size as it consumes more matter. However, some theories propose that a black hole could potentially transform into a white hole in the distant future, but this is still a highly debated topic among scientists.