All Questions
Tagged with optics general-relativity
8
questions with no upvoted or accepted answers
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Critical angle in General Relativity
Analogies between optical propagation in different refractive media and the effect of gravity in light geodesics are well established. But in optics one can have total internal reflection if certain ...
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If a weak light source is attached to a string, and someone swing this light source in circle. It seems that this light source is brighter. Yes or no
It may be truly a question of life and death.
You know those glow sticks.
As a sailor it is a good idea to carry one on our lifevest.
Falling into the sea, those glow stick make a light source that ...
2
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1
answer
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Huygens Principle and the bending of light
In the last section of Einstein's paper of general relativity (1916), he deduced the curvature of light when passing massive objects. It says from Huygens' principle, the light rays must suffer a ...
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Transformation of the frequency of a photon after an infinitesimal coordinate transformation
I am having trouble understanding a calculation done by V. Mukhanov in his book "Physical Foundations of Cosmology". In the beginning of the chapter 9, the following arguments are stated:
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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 ...
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Michelson-Morley interferometer in free fall
We suppose that we have a Michelson-Morley interferometer in free fall, will there be no interference: the round trip time in both arms of the interferometer is the same?
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Plausibillity of using a black hole as a telescope?
I recently learned about the proposed FOCAL telescope, which would use the Sun's gravity as a lens to observe exoplanets (or whatever it's aimed at) with incredibly high resolution. Obviously, the Sun ...
1
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Direct observation of Gravitational Waves via increased resolution
First, congrats to the event horizon team for the first photograph of a black hole.
Not to downplay the significance of the photo, but it is a bit blurry. Still, it got me thinking.
One might expect ...
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