All Questions
22
questions
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34
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How will Newton's rings look using a Concave-convex lens?
I want to examine lenses that are concave-convex (one for each side) using the Newton's rings method.
I'm trying to build the theoretical model for this, but I'm quite sure that the rays of light will ...
0
votes
1
answer
302
views
Imaging a diffraction grating as it passes through a lens' focal point
I am trying to understand the image created when a coherent light source is incident on a diffraction grating as it is swept through the focal point of a lens. The situation is illustrated in the ...
-1
votes
1
answer
39
views
Multi-slit interference [closed]
In an article related to multi-slits interference, the displacements of oscillating waves originating from different slits that meet each other in the detector are written as follows:
According to ...
- 13
0
votes
1
answer
170
views
In a Mirau Interferometer what is the distance between the mirror and the beamsplitter?
A Mirau interferometer (shown left in the figure, next to the Michelson configuration to the right) is an important instrument for non-contact surface profilometry.
Briefly, taken from Wikipedia, &...
- 611
0
votes
1
answer
96
views
Will the equations derived for dark and bright fringes remain the same in this case too, or will there be changes?
We know in YDSE experiment we calculate position of white and dark fringe by calculating the path difference using Pythagoras theorem and equating it to $n\lambda$ and $\frac{2n-1}{2}\lambda$ ...
- 361
0
votes
2
answers
50
views
Add coherence length factor in source term for light source
I am trying to model the behavior of a Michelson-interferometer driven by a light source with a short coherence length (i.e. some centimeters at max.). By placing transmittive material in one of the ...
- 365
1
vote
3
answers
3k
views
Why is it harder to use a white light source in a Michelson Interferometer?
In a Michelson Interferometer, a light beam is split into 2 different beams that travel different optical paths, through the "arms" of the interferometer. Then, they are reflected and, ...
- 548
2
votes
0
answers
65
views
Infinite sum of transmitted parallel light fields
I'm currently studying
optics and came across the possibility of retrieving the original electric (light field) from a pair of partially reflecting mirrors, but I am confused by several ...
- 1,047
0
votes
2
answers
566
views
Treatment of "thickness" of medium for light traveling through a low-index medium and being reflected from the surface of a high-index medium
I am currently studying the textbook Modern optical engineering, fourth edition, by Warren Smith. Section 1.5 Interference and Diffraction says the following:
Now if the waves arrive at C in phase, ...
- 889
2
votes
1
answer
3k
views
Derivation for optical path length and the origins of the formula
So I've learnt that the formula for optical path length is $OPL = ns$, where $n$ is refractive index of the medium and $s$ is its geometrical length, the problem is i cant really get around this ...
- 21
0
votes
1
answer
700
views
Why does peak wavelength decrease with angle of incidence in thin-films?
I'm trying to understand intuitively why the peak reflected light from a thin-film decreases in wavelength with increasing angles. To me, it seems it should be the opposite. I know the peak ...
- 55
6
votes
2
answers
1k
views
Do reflected and incident rays interfere?
I have a very simple question about incident an reflected waves. Consider for instance an incident light ray on an interface between two different materials. We know that there will be a reflected ...
- 1,319
2
votes
1
answer
303
views
Fabry-Perot Interferometer
let's consider a Fabry-Perot interferometer:
Illumination is provided by a diffuse source, and its rays are focused towards the cavity by a lens. Inside the cavity there are multiple reflections and ...
- 1,319
1
vote
1
answer
892
views
"Partial" Total Internal Reflection
Can partial TIR happen?
Consider the image present in this link
Here, at point D, TIR happens, but also there is transmission.
Is "total" internal reflection a misnomer?
- 257
4
votes
1
answer
6k
views
Confusion regarding path difference by glass slab in YDSE
If in a YDSE experiment the setup is immersed in a medium $n_{med}$, and a glass slab of thickness t of another medium $n_{glass}$ is introduced in front of one slit, then is the path difference due ...
