All Questions
Tagged with refraction special-relativity
5
questions with no upvoted or accepted answers
2
votes
2
answers
101
views
How do we know that light cannot travel faster than it does?
We assume the speed of light in vacuum is its maximum speed but can we not assume that it could be faster, or slower?
- 21
1
vote
1
answer
130
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Can the Dirac Hamiltonian accommodate a variable speed of light?
The Dirac Hamiltonian has the form1
$$\left[\beta m c^2+c\sum_{n=1}^3\alpha_np_n\right]$$
where $\alpha_n$ and $\beta$ are Hermitian matrices, and $c$ is the speed of light.
My question: Is there a ...
- 411
1
vote
1
answer
57
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Relativistic equations are medium dependent?
Einstein proposed that light travels with a universal velocity from Maxwell's equations on electromagnetism. But light has different velocity in different mediums, so does this imply that the ...
user208263
0
votes
1
answer
76
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Gain medium and the speed of light
I am currently studying optics, and when taking a closer look at refractive indices, I stumbled across gain mediums.
On Wikipedia it states that gain mediums can have a refractive index of $n<0$.
...
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-1
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2
answers
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Does the speed of light have a range of speeds due to medium-dependency?
An EM particle-wave propagates in a vacuum at a constant speed $c$, independent of the source/receiver but dependent on most mediums it moves through. Since the vacuum is a medium, and if logically ...
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