All Questions
17
questions
2
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0
answers
69
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When falling freely into a black hole, how far does space extend out in front of you? [closed]
Falling freely into a black hole (assuming we survive or being point-sized) all particles in front of you are accelerating away from you in the direction of the singularity which seems flying towards ...
- 500
0
votes
1
answer
144
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How do infinitely dense singularities evaporate trough hawking radiation?
If we assumed that a black hole with a singularity of infinite density eventually evaporates due to Hawking Radiation, does this affect the singularity itself?
If mass is preserved in the singularity ...
3
votes
0
answers
67
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Regular black hole with an evanescent horizon
I'm reading a great paper named Geodesically Complete Black Holes by R. Carballo, F. Filippo, S. Liberati and M. Visser about regular black holes and I'm trying to understand a particular situation. ...
- 403
1
vote
1
answer
140
views
Hawking radiation and the removal of singularities
Using QFT in curved spacetime, Hawking was able to show that black holes evaporate. Whilst this has never been observered, the commonly excepted statement is that black holes continually radiate until ...
- 558
2
votes
1
answer
166
views
Particles reaching a singularity [closed]
If the gravity well steepens to infinity at the point of a singularity, then so does the "time well". Understandingly, the inward falling energy/matter is not aware of this change in time relative to ...
1
vote
0
answers
43
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Would you reach a singularity before evaporation of the black hole? [duplicate]
When going to a physics camp the other day, we discussed the Schwarzchild-metric for a rotational symmetric non-spinning black hole and its famous time-dilation properties.
However, we know that ...
- 1,945
3
votes
1
answer
151
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Black Hole rotation and acceleration
I have been reading some about the black holes and the rotation about it, and have also heard about the fastest spinning black hole (NGC 1365), which as I understand, its rotation is 86% the speed of ...
- 107
0
votes
1
answer
87
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Theory on the anatomy of a black hole [closed]
I'm pretty new to physics, and have just started really getting into it the last year or so, but I had an idea about the anatomy of a black hole.
I was wondering if it were possible that a black ...
2
votes
3
answers
301
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Can objects escape black holes by waiting?
Assuming that Hawking radiation cause black holes to become less massive over time, it should follow that the event horizons of black holes should shrink over time as well.
In this case, what would ...
- 916
2
votes
1
answer
269
views
Thought experiment: ultra-fast outward push inside a black hole
Suppose I have a classical schwarzchild Black hole $B$ of mass $M$. And consider a spherical-subset (or sub-black-hole if you will) $B'$ (sharing the same singularity and having mass $M'$ (We will ...
- 2,989
5
votes
1
answer
1k
views
Spaghettification on an atomic scale?
Spaghettification occurs when an object approaches a singularity. As one comes close enough to the singularity, the gravity at the feet (if this is a human) is greater than that at the head, ...
- 567
42
votes
5
answers
6k
views
Why do physicists trust black hole physics?
Based on popular accounts of modern physics and black holes (articles, video lectures), I have come to understand the following:
Black holes are predicted by General Relativity, a classical theory of ...
- 585
1
vote
0
answers
40
views
Evaporation of a black hole [duplicate]
What happens to the singularity within a black hole when a black hole evaporates? If there is a point in space which is both infinitely dense and small, do they simply evaporate as well?
- 103
1
vote
1
answer
212
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Singularity and evaporation of black hole
A question I have found that, in a question it is saying that what will be happened to the singularity when black hole evaporates. But recently I have checked that Stephen Hawking denied the ...
- 337
3
votes
2
answers
1k
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Does a black hole have enough time to actually form a singularity?
I am trying to wrap my head around black holes, singularties and hawking radiation. Physics.se contains many intresting questions and answers, but from none I could so far read about the interaction ...
- 269