All Questions
17
questions
0
votes
1
answer
89
views
What would stationary light look like? [closed]
I mean, have we ever witnessed what we understand and call as light at rest, and what would it look like at rest?
0
votes
3
answers
769
views
How to approximate a light source as a point source of light?
A point source of light is "single identifiable localised source of something" (from Wikipedia). However, there are no true point sources of light in nature, since no object is as small as a ...
- 303
0
votes
1
answer
83
views
Using flat or thin glass for Surface Plasmon Resonance
SPR is typically created using prism with a thin gold film on the other end. I was wondering if I cut the triangular prism (using a glass cutter at home) into thinner slices, would this have an impact ...
- 101
3
votes
3
answers
849
views
Why does light reflected from a surface is s polarized? Why p polarized light is refracted?
I cannot understand the physics behind the reflection and polarization-reflection on an atomic scale. What exactly happens at the boundary of two surfaces?
I was studying Brewster's law and thus this ...
0
votes
1
answer
81
views
Prism parameters influence on Surface Plasmon Resonance
I have been interested in researching a lot about surface plasmon resonance (SPR) and I was wondering exactly how the thickness and the size of the prism affects the results? I could not find an ...
- 101
3
votes
1
answer
2k
views
How to produce light of a certain wavelength?
Is there a device which takes as input the wavelength or frequency value and produces electromagnetic waves of the given wavelength or frequency using an emitter? It might be that the wavelength range ...
- 1,088
0
votes
0
answers
83
views
What are common materials that absorb near infrared radiation?
I am running an experiment in my university lab where I want to compare with a sensor how much IR radiation gets transmitted in different scenarios. I need some (preferably common) materials that ...
- 249
2
votes
1
answer
321
views
Breit–Wheeler γ γ′ → e+ e− pair production with hohlaraum as photon target; is this particular experiment going to be carried out?
The IFLScience article Scientists Work Out How To Make Matter From Light describes photon-photon collisions producing pairs of particles, and the Nature Photonics Letter A photon–photon collider in a ...
- 6,273
2
votes
3
answers
335
views
Top hat laser beam
Could you obtain a Gaussian profile from a square tophat laser beam?
If yes what optics should be used?
- 39
10
votes
3
answers
297
views
Detailed form of light waves in vacuum and how to test it experimentally?
Consider a light wave in vacuum.
Do the $\vec{B}$ and $\vec{E}$ fields have to be orthogonal to each other? Since you can add constants to a solution to Maxwell's equation it doesn't seem neccesary ...
- 1,692
1
vote
1
answer
272
views
Plane Mirror as the Screen in Young's experient
If I place a plane mirror instead of the screen in the Young's double slit experiment, what will I see? Will the bands appear on the mirror face?
- 81
2
votes
1
answer
275
views
Can a nuclear bomb be used as the power source for a laser beam
My previous post "Using nuclear bombs to detect near earth orbit objects" asked about using nuclear devices to detect Earth directed asteroids and low albedo comets. Now I want to explore a method of ...
user74893
7
votes
3
answers
810
views
Clarification about Bragg's law explanation
The Wikipedia has this illustration of Bragg's law
and then says
The two separate waves will arrive at a point with the same phase, and hence undergo constructive interference, if and only if this ...
- 609
2
votes
1
answer
85
views
How does an optic-mechanical laser read and send binary bytes to a CPU?
Thid greatly concerns physics, since a more refined version of my title will be rehearsed below:
How is the physical structure of the mechanical eye use a laser to read binary bits held on an optical ...
- 21
2
votes
2
answers
19k
views
How does Newton's 2-prism experiment help to explain why light does not get dispersed into 7-colors in a parallel glass slab? [duplicate]
In a real parallel glass slide(with two prisms imagined to be touching each other to form a parallel glass slide),
The ray of light should pass through the Z in between without any dispersion or ...
- 101