All Questions
Tagged with optics wavelength
149
questions
5
votes
2
answers
4k
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Is the frequency/wavelength of light modified when multiple light sources are combined? [duplicate]
Let's say I light a wall with two spotlights: One red and one green one. Where they overlap, I'll see a yellow area at the wall.
My question is, whether this is caused by an modification of the ...
- 153
2
votes
1
answer
161
views
Is information about the speed of light hidden in its spectrum?
Can the speed of light in the vacuum (c) be inferred from the spectrum of light?
If that is not the case is it possible to tell from lights spectrum that it has entered a different medium, e.g. can ...
- 423
4
votes
2
answers
750
views
Diffraction pattern when wavelength tends to zero
While studying about Fresnel and Fraunhofer diffraction, I came across a statement which says that the fringes disappears and the image would take on the limiting shape of the aperture when wavelength ...
- 41
2
votes
1
answer
164
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Is there a one-to-one relationship between colour theories and our trichromatic vision?
This has started to bug me more and more… it involves:
colour theory
the trichromatic properties of our eyes through cone cells
and light.
Is there a one-to-one relationship between colour theories ...
- 123
2
votes
0
answers
1k
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How does a Fresnel rhomb work (half and quarter wave plate)?
How does a Fresnel rhomb work (half and quarter wave plate)?
I am aware of birefringence, which creates a phase shift of $\Delta\phi=\dfrac{2\pi\Delta nL}{\lambda_0}$. But this doesn't explain how a ...
- 713
68
votes
12
answers
34k
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Is it possible that there is a color our human eye can't see?
Is it possible that there's a color that our eye couldn't see? Like all of us are color blind to it.
If there is, is it possible to detect/identify it?
- 839
0
votes
2
answers
1k
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Wavelength comparison of two waves
Is there any non-digital (naturally existing) mechanism to compare two or more waves in such a way:
...
- 111
2
votes
1
answer
3k
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Laser Coherence Length/Time
Scenario:
Imagine a collimated beam of white light falling on one refracting face of a prism. Let the light emerging from the second face be focused by a lens onto a screen. Suppose there is linear ...
- 381
10
votes
3
answers
3k
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Why do rainbows have distinct colors?
When I searched on the Internet for the reason of formation of rainbows, I got many explanations like this one & this. All the explanations consider only one spherical water droplet (like this one)...
- 1,035
1
vote
1
answer
2k
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Find the dispersion of the slab?
I've been having trouble with this for a few days and already used up all my tries on the homework for it, but have the final is coming next week. Thus I would like to know how do this, however I ...
- 11
4
votes
2
answers
6k
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Wavelength-dependent refractive index
I read in a book about optical fibers that the different spectral components of a light pulse transmitted in the fiber propagate with different velocities due to a
wavelength dependent refractive ...
- 237
3
votes
0
answers
111
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Optics: finding total power of a system, including wavelength
Specifically I need to create an ABCD matrix given 2 radii of curvatures, the thickness of the lens, type of glass (BK7) and a given wavelength. I will have to figure this out eventually, so help ...
- 31
0
votes
1
answer
265
views
Merge different wavelength rays
Let's say an array of rays of light is given.
Each ray has a specific wavelength (in the range of visible light).
Example:
...
- 133
11
votes
6
answers
4k
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What causes polarised materials to change colour under stress?
Our physics teacher showed the class a really interesting demonstration. He used two polarised filters in opposite orientations, then he took some antistatic tape and stretched it under the two plates....
- 3,197