All Questions
6
questions
2
votes
0
answers
63
views
Does gravitation (or acceleration) make an observer see squeezed light and squeezed matter?
I read at the end of this question that Matta wrote:
"If I put a quantum field on a spacetime and boost to an accelerating reference frame then the field modes undergo squeezing which is a ...
- 708
3
votes
2
answers
77
views
When gravity bends light, does the light still propagate orthogonally to its $\vec E$ and $\vec B$ fields?
An ordinary photon travels perpendicularly to the direction of its oscillating E & B vector fields (i.e. $\vec{v} \propto \vec{E} \times \vec{B}$). Let's say $\vec{E}$ is oscillating "in-out" of ...
- 945
-3
votes
5
answers
411
views
What causes a single photon to divert its trajectory?
If a single photon passes close enough to a star, the gravity will diverts its trajectory. What causes a photon to divert its trajectory as it passes a sharp edge or the boundary of two mediums?
- 4,083
1
vote
1
answer
808
views
Treating gravitational lensing as index of refraction
In Einstein's theory of gravity, an electromagnetic wave passing near a massive object is bent from its rectilinear path. We may regard this bending equivalently as due to a medium of refractive index ...
- 1,116
3
votes
2
answers
312
views
Gravitational distortion of an object's diameter, at a distance,
Does the curvature of space-time cause objects to look smaller than they really are? What is the relationship between the optical distortion and the mass of the objects?
- 31
43
votes
5
answers
15k
views
How does gravitational lensing account for Einstein's Cross?
Einstein's Cross has been attributed to gravitational lensing. However, most examples of gravitational lensing are crescents known as Einstein's rings. I can easily understand the rings and crescents, ...
- 6,044