All Questions
7
questions
4
votes
3
answers
2k
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Where does all the energy in black holes go?
The temperature inside of a black hole is almost absolute zero, so particles inside a black hole have almost zero motion.
So if they don't give out any heat or light, where does all the energy it ...
- 57
4
votes
3
answers
97
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What if black hole is perturbed and it is far from being spherical/symmetric? Can it still sustain a singularity?
Black holes are generally the considered as the most symmetric astrophysical bodies in the Universe. If an intermediate mass black hole consumes a nearby red giant and in the process, for a very short ...
- 125
0
votes
2
answers
762
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Black holes: where is its mass? In a singularity or on the horizon?
The entropy of a Schwarzschild black hole is located near the horizon, and the moment of inertia of a Schwarzschild black hole is $MR^2$. Both aspects imply that the mass of a Schwarzschild black hole ...
user85598
0
votes
1
answer
138
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Schwarzschild Naked Singularity Creation
In the Schwarzschild metrics (Plank units):
$$ds^2=-\left(1-\frac{2m}{r}\right)dt^2+\left(1-\frac{2m}{r}\right)^{-1}dr^2+r^2\left(d\theta^2+\sin^{2}\theta d\phi^{2}\right),$$ we can have a Black Hole (...
- 770
4
votes
2
answers
3k
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What happens to a photon when it enters a black hole?
The photon has a mass of 0, but it has energy because of its motion. When it is sucked into the black hole and becomes a singularity, it loses its energy because it is no longer moving. It is not ...
- 41
0
votes
1
answer
149
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Temperatures at extreme densities
Cosmology (and astrophysics) talk about the "initial singularity" (IS, became the big bang) and "black hole singularities" (BS, inside black holes), and these appear to be quite different: The IS is ...
6
votes
2
answers
2k
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What happens when a black hole dies?
Does it just vanish into space leaving nothing behind or does it expel some material?
Also, talking more about black holes, as far as I understand the term "temperature", it is defined by ...
- 61