All Questions
Tagged with electromagnetic-radiation optics
712
questions
-3
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Is there an IR-camera-detectible color that can be the coat for a material to transfer the material heat by emitting into the space? [closed]
If we see a material it is coloured in a color that our brain could easly recognize. But when we look at it by the help of an IR camera it could also be coloured and if two materials have same ...
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0
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26
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Is there a substance which can pass both IR and UV radiations?
I have been thinking about this for a while. A quartz prism allows UV Radiation to pass. A rock salt prism allows IR radiation to pass. Glass absorbs both.
Is there something, that is, a substance to ...
- 1,809
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14
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How to use dipoles to enforce the boundary conditions for a spherical dielectric with complex permittivity
I want to impose an electric and magnetic field on a spherical dielectric of radius $ R $ and relative permittivity $\epsilon_r=\epsilon'+i\epsilon''$. Say the fields are slowly-varying (like a plane ...
- 1
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2
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123
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Diffraction when the wavefront is not parallel to the plane
I am studying Feynman's chapter on the origin of the index of the refractive index (see this link).
If I am not mistaken, what he does is to prove that when a wave enters a medium (modelled as a ...
- 2,697
2
votes
0
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38
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Direction of propagation of extraordinary wave inside a birefringent medium
I am reading Optics by Ajoy Ghatak, in which the author explains the phenomenon of double refraction in a calcite crystal using Huygens' principle. My query is in the analysis of the case of normal ...
- 21
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0
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26
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Solarization Spectrum
I'm looking to better understand the relation between the spectrum of the light which induces solarization in glass and the spectrum of the induced absorption.
More specifically, I'm interested in ...
- 1,538
84
votes
3
answers
10k
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Can photons be detected without being absorbed?
I am thinking about a detector that would beep if light passes through it. Is it possible?
- 46.1k
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0
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96
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How to compute the diffraction efficiency of a thin phase grating with arbitrary groove shape?
From Magnusson and Gaylord (1978), the wave amplitudes, $S_i(z)$, of $p$-polarized light for a thin, arbitrary phase grating are given by the equation
$$
\frac{\partial S_i}{\partial z} + \gamma \sum_{...
- 123
1
vote
1
answer
52
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Confusion regarding phase
As far as I know about phase if the phase difference between two waves is positive, the former is leading..and the latter is lagging. Then why has D J Grifith stated this?
If the phase of the magnetic ...
- 224
1
vote
1
answer
40
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Can an optical medium be lossless and dispersive?
Occasionally, I come across the phrase "lossless dispersive linear optical medium". How can such a medium be possible mathematically? I mean the real and imaginary parts of the electric ...
- 39k
11
votes
4
answers
2k
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Can the laser light, in principle, take any wavelength in the EM spectrum?
Can the laser light, in principle, take any wavelength in the EM spectrum? I don't think there is what prevent this in principle, right?
- 160
2
votes
1
answer
888
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Help understanding Fizeau's calculation of speed of light
While searching for different methods of calculating Speed of light, I came across one of the methods that Fizeau discussed below which I cannot fully understand.
In short, in Fizeau’s apparatus, a ...
CommunityBot
- 1
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votes
5
answers
236
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Is there a filter which can directly convert sunlight to microwaves?
Is there a way to filter sunlight (visible, UV, and/or IR) and convert the energy from it directly into microwaves without putting in any energy? Barring this, is there a way to do the same but while ...
CommunityBot
- 1
0
votes
1
answer
745
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What is the physical meaning of the complex field amplitude?
I see that the harmonic field is sometimes written in exponential form. But sometimes the complex amplitude of this form is just a constant and in others (like when talking about modes) is dependent ...
CommunityBot
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2
votes
1
answer
47
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Is there a way to use the optical transfer-matrix method to determine the absorbance of each layer in a multilayer stack?
I've implemented the transfer-matrix method to determine the the transmittance and reflectance of a multilayer stack of thin films.
I know that (ignoring scattering) the absorbance of the entire stack ...
- 171