All Questions
Tagged with electromagnetic-radiation gravity
57
questions
0
votes
4
answers
232
views
Could gravitons just be low frequency photons?
James Clerk Maxwell determined that E-M waves propagate only at the speed of light, so considered that light may be an E-M wave. This was later shown to be correct.
Given that gravity also ...
- 2,637
1
vote
1
answer
272
views
Ground state(s) of electron and dependence from temperature and gravitational potential
Reading this question What happens to an electron in a molecule once it has absorbed a photon and transitioned? it occurs the question to me is the ground state say of a hydrogen electron the only one?...
- 10.6k
0
votes
2
answers
343
views
Gravitational waves vs. electromagnetic for telecommunications
Assuming it would be possible, what would be the advantages/disadvantages of manipulating gravitational waves for telecommunications versus using electromagnetic?
- 11
15
votes
3
answers
616
views
Can the question of a gravitationally accelerated charge radiation be tested experimentally?
I know that the question of radiation from a gravitationally accelerated charge has been discussed extensively at Does a charged particle accelerating in a gravitational field radiate?. Yet the ...
- 166
1
vote
1
answer
278
views
'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
2
votes
2
answers
748
views
Does light have mass? [closed]
Does light have mass?
If yes, will it exert force?
If no, then how are light particles are travelling at light speed?
If light doesn't have mass how is it attracted by gravitational force (black holes)...
- 41
4
votes
0
answers
184
views
Will the photon wavelength fluctuate in the presence of a gravitational wave?
The microwave background is due to the expansion of the Universe where the wavelengths of radiations are stretched by spacetime.
As in the LIGO experiment, in the presence of gravitational wave, ...
- 1,995
1
vote
1
answer
261
views
Do electrons emit radiation due to gravity [duplicate]
Do electrons accelerating in the presence of a gravitational field radiate due to this acceleration?
- 6,015
1
vote
1
answer
382
views
Propagating higher order Hermite Gaussian modes. What are complex amplitude coefficients?
I've been tasked with writing a code (in MatLab, but I'm currently using Mathematica because I don't know MatLab %\ ...) to simulate the propagation of a Gaussian beam.
I don't really know anything ...
- 193
1
vote
3
answers
2k
views
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
9
votes
3
answers
2k
views
Why is it hard to detect a black hole
I've read in some texts that we can't directly observe a black hole in space because not even light can escape from its gravity. Some of the indirect observational methods mentioned are, gravitational ...
- 359
4
votes
2
answers
293
views
Why does General Relativity predict more light deflection than Netwonian Physics?
If one looks at the limit as light's mass approaches zero, Newtonian Physics predicts a deflection of light (this can be seen by the fact that all objects are accelerate the same due to gravity.) ...
- 2,172
3
votes
1
answer
1k
views
Electromagnetic radiation bending on Earth
Most articles say that a radiowave is able to propagate itself beyond the horizon because it is reflected off by the ionosphere (and the Earth itself).
But do radio waves also get bent according to ...
- 133
8
votes
1
answer
373
views
Can light gravitationally affect itself?
Consider a electromagnetic wave in a vacuum. From my understanding of general relativity,
The wave has momentum, and thus generates a gravitational field in all directions.
The gravitational field ...
- 235
3
votes
1
answer
115
views
Accelerating masses lose energy?
If I understand this correctly, accelerating charges lose energy in the form of EM waves because they change the electric and magnetic fields, which "costs" energy. Does that mean that accelerating ...
- 832