All Questions
Tagged with electromagnetic-radiation black-holes
35
questions
3
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3
answers
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Photonic black holes
"Can a photon turn into a black hole?" - usually the answer to this question is - it can't, because it has zero rest mass. However, when we derive the Schwarzchild Metric initially the $2M$ ...
- 1,141
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2
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Is the curvature so extreme at the event horizon, that you could see curved laser beams?
I have read this:
Because the spacetime curvature at the horizon is so great that there is no light-like world line the extends beyond the horizon.
Why does time stop in black holes?
If the ...
- 29k
0
votes
1
answer
141
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What is the smallest possible wavelength? [duplicate]
I was thinking about this the other day after a quantum mechanics lecture (unrelated to the lecture I was taking) and pondered "Is there a minimum wavelength for a photon?", through ...
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1
vote
1
answer
151
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Different Escape Velocities of Black Holes?
I am no physics major nor math major to this but merely an amateur cosmology enthusiast, so in my previous inquiries I wasn't able to find anything on the premise that if all black holes obviously ...
- 29
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0
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Super-radiant amplification in electromagnetic perturbation in Kerr background
Let an electromagnetic field be scattered by a Kerr black-hole; then its amplitude will be amplified, but its frequency will remain same (super-radiant amplification). Hence though its intensity will ...
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2
votes
3
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413
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Do light particles have thrust? [duplicate]
I understand that nothing is faster than light and that it can not escape a black hole. However, light particles may be fast, but perhaps it can't escape a black hole due to it's lack of thrust power? ...
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11
votes
1
answer
2k
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Can a Black Hole be moved by lasers?
I've read that an object colliding with a black hole will move it, as it would any other object. Could a laser continuously fired into a black hole move it?
- 719
3
votes
2
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252
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Bremsstrahlung Radiation [duplicate]
A thought experiment.
Consider an electron falling into a black hole. From an external observer to the electron and the black hole, the electron accelerates, and should give off Bremsstrahlung ...
- 131
2
votes
2
answers
276
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Do white holes bend light?
White holes share a great deal of properties with black holes such as being completely characterized by rotation, mass and charge, even they have a Hawking temperature. However, I am not able to argue ...
- 129
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0
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Does some of accretion disk light make focal points above the black hole poles? [duplicate]
Does some of accretion disk light make focal points above the black hole poles?
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-1
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1
answer
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Black holes by blueshifted light
If you can make black holes out of light you can make black holes out of light that is emmited from the moving frame and concentrated into one spot and that would not have enough energy to form a ...
1
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0
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Could photons eventually turn into black holes according to an observer traveling faster and faster towards the light source due to blue shift?
The following question was answered and the answers do make it seem like photons with a high enough frequency, could, in theory, turn into black holes:
How much energy does a photon need to form a ...
0
votes
1
answer
58
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Extreme Redshift Detection
There is a new paper in arXiv postulating that black holes might actually let some let some light out. This of course is very theoretical, but it postulates that the light would be redshifted to 640 ...
- 477
3
votes
1
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97
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Could there be a magnetic version of Hawking radiation?
From my, probably flawed, understanding of Hawking Radiation, virtual particles get turned into non-virtual particles. I'd imagine since both Gravity and Electromagnetism both follow the inverse ...
1
vote
1
answer
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How does light energy increase when passing through the ergo sphere of a black hole?
I watched a video recently about using the ergosphere of a spinning black hole as a source of virtually infinite energy by surrounding it with mirrors and shining electromagnetic waves in there. In ...
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