All Questions
Tagged with refraction dispersion
76
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How to obtain the dispersive refractive index of a sample in a Michelson interferometer from the interferogram?
In the Michelson interferometer setup shown below, first I obtain the interferogram of the source (without sample). Then I put in the sample.
If the sample is not dispersive (its refractive index is ...
- 903
-4
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Speed of the color red
Taking aside all of the other variables that can alter the color's speed; i.e. sound, mass, water, magnetism. And just focusing on the color itself, how fast does the color red travel, using the means ...
6
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Why is rainbow always circular?
From the article that I read on physics classroom website on rainbow, rainbow is formed with red on the top and violet on the bottom because violet refracts more, and has a smaller angle of deviation ...
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Refraction of white light through a glass slab: what does it actually look like?
When a collimated beam of white light enters a rectangular prism, it develops slightly coloured edges due to the dispersive refraction of the glass: each ray in the beam is displaced differently ...
- 134k
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Refractive index and electric susceptibility
Suppose we have a complex refractive index $n_{ref}=n+ik$ whose value is given at a precise frequency $\omega_l$ from experimental data. We know that the imaginary part is responsible for the loss/...
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Frequency dependence of the speed of light in air
According to this link, the speed of light of different colors in a medium should be different. But if the refractive index of light in air is 1 then this means that the speed of light in air and ...
- 1,116
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Which electromagnetic radiation is faster in water, microwaves or light?
Well I've been asked this question, but I haven't been able to come with an answer yet using books and some web searches. The point is as the title says, to answer the question with the whole ...
Alan
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Why does the speed of the Electromagnetic wave in the material depend on the frequency of the wave where as they are constant in vacuum (freespace)? [duplicate]
I am confused on why would the propagation speed of any EM waves at ANY frequency is constant in the free space (vacuum) but they seem to disperse in any other materials as the propagation speed of EM ...
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Absorption of waves in a plasma
Suppose a plasma has characteristic frequency $\omega_p$. Since
$$n = \sqrt{\left(1-\frac{\omega_p^2}{\omega^2}\right)} $$
For $\omega<\omega_p$, the refractive index will be imaginary - which ...
- 933
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On what refractive index of medium depends ? [duplicate]
does the refractive index of a medium depends on wavelength of light passing through it ? If yes then why ?
- 1,847
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Speed of different em radiation in a medium [duplicate]
Does all frequency of light travel with the same speed in a particular material like glass?
Since by cauchy's relation refractive index change with wavelength which implies the speed also changes.
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Dispersion relation of silicon
In the case of dispersion relation of silicon having crystal plane orientation 111; what is the Sellmeier's equation for refractive index $n$ of silicon orientation 111 & what it's extinction ...
13
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Why does the refractive index depend on wavelength? [duplicate]
Why do different wavelength get impeded more or less when in different materials? Moving with the same speed, but a longer physical distance would imply that the fields oscillate less times in the ...
user24082
2
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3
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Two different mediums can have equal index of refraction?
In other words: given a certain medium, is light's phase velocity unique?
- 133
61
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Why do prisms work (why is refraction frequency dependent)?
It is well known that a prism can "split light" by separating different frequencies of light:
Many sources state that the reason this happens is that the index of refraction is different for ...
- 12k