All Questions
Tagged with electromagnetic-radiation black-holes
35
questions
2
votes
3
answers
271
views
Can High Energy Light Escape a Black Hole after Low Energy Light Cannot
Perhaps there is another way to calculate the escape velocity, or perhaps light always has the same kinetic energy regardless of the energy of the light, but shouldn't the event horizon of a black ...
- 181
3
votes
2
answers
227
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Can a photon circle a black hole indefinitely?
Does a photon lose energy or redshift as it circles?
Will it's wavelength be the rest wavelength with centripetal and gravitational forces exactly cancelling?
- 182
0
votes
1
answer
671
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How does black hole suck light? [duplicate]
I was asked the same by my friend. I said that gravitational attraction also occurs for high energy particles .
My friend said photon is not so very high energy particle which I found on net. He ...
- 1,149
0
votes
1
answer
52
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Can I change the speed of light in vacuum? [duplicate]
General theory of relativity proved that gravity does attract light ( photons ), what if I project a beam of light radially towards a black holes will it increases it's speed or not?
user203191
0
votes
1
answer
67
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Photons and Black holes [duplicate]
A black hole is listed as "a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it" One ...
user172320
1
vote
0
answers
101
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Naked Singularities Out of Extremal Black Holes?
Consider a pair of identical extremal black holes at rest. It is a fact that they exert no net force on each other and remain in static equilibrium. Now, clearly, each of the black holes is in ...
user87745
0
votes
2
answers
60
views
Could one extract light out of a black hole via evanescent waves?
The Schwarzschild radius of a black hole is a classical barrier for light from inside of a black hole. But we know from electromagnetic waves and quantum mechanics that classical barriers can be ...
- 9,910
4
votes
1
answer
235
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Correlation between gravitational and electromagnetic radiation from collision of Kerr-Newman black holes
When black holes collide, they produce a gravitational wave, as has been recently established by LIGO.
When a charge is accelerated, it creates an electromagnetic wave.
Does an accelerated massive ...
- 653
2
votes
0
answers
61
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On a Doppler-shift-induced radiative dissipation of angular momentum for the accretion disk of a black hole
A recent question explored the possibility that the accretion disk of a black hole could wind down and lose its angular momentum through radiative process, and Rob Jeffries' excellent answer there ...
- 134k
3
votes
1
answer
134
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Do black holes radiate light? [duplicate]
I have a difficulty with understanding Hawking radiation. So far, I have "understood" (I can be wrong!), that the intense gravity of a black hole can split pairs of virtual particles so that one ...
- 3,433
1
vote
1
answer
275
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What is the speed of a kugelblitz black hole?
Would a kugelblitz black hole travel at the speed of light? Would it slow down after swallowing more mass?
- 111
2
votes
3
answers
362
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Can photons be created without an electric charge involved?
It seems that in common ways how to produce light (electromagnetic waves, photons) must be involved particles with electric charge: accelerating electrons, spontaneous or stimulated emission, gamma ...
- 2,163
1
vote
1
answer
278
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'Hovering' light rays on the edge of a black hole
According to Prof. Hawking, light rays will 'hover' on the edge of a black hole. If this is true, and the light 'stops' on the edge, how can the electric/magnetic fields which, constitute the light, ...
- 470
3
votes
3
answers
779
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Can light escape a black hole? [duplicate]
I heard that a black hole is not black because it's escape velocity is greater than or equals to the speed of light. But instead it is black because the light that gets emitted from a black hole gets ...
- 553
1
vote
3
answers
2k
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Why can't light escape a blackhole? [duplicate]
Gravity attracts objects which have mass right. We know that light is massless so why does a black hole's gravity attract light?
- 1,925