All Questions
6
questions
2
votes
2
answers
860
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Can a photon be frozen (relatively stationary) in space? [closed]
There are a lot of questions on this site about photon speed, none of them answer my question:
Why and how is the speed of light in vacuum constant, i.e., independent of reference frame?
If ...
- 29k
3
votes
1
answer
182
views
Can light of certain wavelengths stably orbit a black hole at the photon sphere?
I've recently learned that for a black hole, its photon sphere is an unstable orbit. Light either manages to escape from or fall into the event horizon, depending on how far away from the edge of the ...
- 41
5
votes
1
answer
305
views
Black hole wrapped in mirror (at the horizon) reflecting the present (interactive, not frozen image) or the past (frozen image)?
I have read this answer from John Rennie.
https://physics.stackexchange.com/a/39388/132371
Where he says that to a Schwarzschild observer, anything reaching the event horizon will seem to be frozen ...
- 29k
4
votes
0
answers
88
views
Can this relativistic hack allow one to see beyond an event horizon, in principle, else why not? [duplicate]
Consider a lone photon. As its frequency increases, its energy increases. Taken to the limit, a sufficiently-high-frequency photon could be a black hole unto itself.
But the frequency of a photon is ...
- 5,148
2
votes
2
answers
1k
views
What the lifetime of a massless black hole of photons?
Let a bundle of photons very concentrated in a very small area so that the space-time is curved as a black hole, and the photons can't escape: this is what I call a massless black hole of photons.
...
3
votes
2
answers
2k
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What happens to the wavelength/frequency of a photon as it passes through an event horizon?
I've asked a similar question about photons and black holes but wanted to rephrase it more specifically, so here goes...
Ever since I learned how a photon's wavelength and frequency are indivisibly ...
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