All Questions
Tagged with refraction laser
27
questions
6
votes
4
answers
5k
views
How do "holographic plates" work?
I asked a question about laser stage lighting over at Audio Video Production, and received an excellent answer that explained that laser clusters are generated from a single beam via something called ...
- 822
5
votes
2
answers
2k
views
Using a transfer matrix to calculate beam width of off-axis Gaussian beam?
I have been reading a lot about ABCD matrices that are used for ray tracing. I can calculate the output offset $r_{o}$ (with respect to the optical axis) and the angle $\theta$ of the ray by
$$
\...
- 51
4
votes
2
answers
3k
views
Why does a laser beam stay coherent when it passes through glass?
If I have a coherent laser beam and I shine it through some glass, the light will slow down because it will interact weakly with the atoms in the glass. However, the beam that comes out the other side ...
- 187
3
votes
2
answers
3k
views
Why does laser light not bend (refract) when it travels from air to water?
I passed green laser light from air to water but to my suprise the light doesn't bend towards normal even though I changed the angle of incidence.It goes undeflected ,Is it because of its higher ...
- 47
3
votes
1
answer
65
views
Why does the intensity of the scattered light vary when a monochromatic laser is shined into a transparent object?
When a laser is shined into a glass ball such as this video (link) or a bottle of water (link) the light is refracted through the whole transparent body. However, the intensity of the light scattered ...
- 57
3
votes
0
answers
149
views
Can a powder be transparent?
I know that even glass powder is white due to refraction and internal reflection. So to be transparent, the index of refraction would need to be close to 1 (air).
I also know that the index of ...
- 131
2
votes
2
answers
227
views
Can you burn invisible jelly balls with a laser?
Suppose you have some jelly balls with similar refractive index as that of water, like in this video.
You put them in water, making it invisible. So, the optical behavior of the balls should be ...
- 12.5k
2
votes
1
answer
209
views
Do high powered lasers refract differently than other light?
So I have a question: I am told that there are naval lasers that target over 100's of miles ship-to-ship (not ship to air). Someone asserted that powerful lasers would refract differently than light. ...
- 475
2
votes
1
answer
38
views
Why are $\rm ZnSe$ beam-combiners typically "optimized" for a 45º angle of incidence?
Everywhere I look it seems that $\rm ZnSe$ beam combiners (as the ones sometimes used in $\rm CO_2$ [10600nm IR] laser cutters) are "optimized" or designed to work at a 45º angle of ...
- 21
2
votes
1
answer
204
views
Reflectivity coefficients at dielectric interface
In the book Principles of Lasers by Orazio Svelto, at chapter 4.3 "Wave Reflection and Transmission at a Dielectric Interface", the author tells that
If the wave is initially in the medium ...
- 1,904
2
votes
0
answers
47
views
Is it possible to measure the temperature of a candle by the diffraction method?
I am reading a book " Physics, Fun and Beyond" by Eduardo de Campos Valadares. In his book, he is mentioning about an experiment "bending laser beams with hot air." I am posting a ...
- 221
1
vote
1
answer
130
views
Total internal reflection doesn't occur when it is supposed to
I figured out that when I aim a laser beam on my window at an arbitrary angle, the total internal reflection doesn't occur whatsoever. What's more, the refracted beam seems to be pretty intense. It ...
- 513
1
vote
1
answer
186
views
Effect of the refractive index of a transparent layer coating a particle?
I am modelling a cell as a particle coated by a layer of a material whose refraction index might change. This layer is to resemble the membrane.
The purpose of the model is to simulate what happens ...
- 25
1
vote
0
answers
57
views
Decoherence of a laser beam via oil emulsion
This is sort of a followup to an earlier question that I posted regarding how to destroy the temporal and/or spatial coherence of a laser beam. It was suggested to me that I could use a rapidly ...
- 366
1
vote
1
answer
73
views
Requirements for Z-scan or I-scan measurements of nonlinear optical materials
I am looking to understand what requirements there are for any version of Z-Scan technique or the I-scan technique. These techniques are used for measuring nonlinear absorption and nonlinear ...
- 21