All Questions
Tagged with optics diffraction
516
questions
0
votes
0
answers
95
views
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
2
answers
66
views
Modified two slit diffraction experiment
I thought up a slight modification to the classic two-slit experiment that would be fun to try, but I am certain that I am not the only person to consider it, and would like to know if it has already ...
- 95.3k
2
votes
2
answers
98
views
Why do gaps in my blinds create multiple lines?
Multiple lines appear on my floor every morning from the gaps in my blinds.
Why does this happen and does it have to do with light being a wave, like in the double slit experiment? If so could it be ...
- 23
1
vote
2
answers
147
views
How does the diffraction pattern of a 2-dimensional grating/lattice relate to the reciprocal lattice?
I am trying to understand the relationship between the diffraction pattern produced when shining light onto a 2D lattice and the reciprocal lattice of the direct lattice in question.
So suppose we ...
- 1,581
1
vote
0
answers
26
views
Fraunhofer temporal far-field condition for dispersive Fourier transform (DFT) technique
I am trying to understand the dispersive Fourier transform (DFT) technique for spectral characterization of pulses. In the literature, I found this far-field condition from Fraunhofer approximation in ...
- 11
0
votes
1
answer
37
views
Pointing flash at LCD television creates a weird diffraction effect
I was looking around my room for something with my phone’s flash on, and noticed a very unique pattern reflecting off of the television.
FYI. The flash is white.
Any idea why it diffracts like that?
...
- 390
0
votes
1
answer
53
views
Diffraction of a double slit where the slits are far apart
I'm trying to figure out how I can possibly know the real equation of the intensity of the diffraction pattern of a double slit (I don't care about interference for now). Here are my thoughts:
...
- 1
0
votes
2
answers
54
views
Why is the shorter the wavelength, the smaller the object you can image? and vice-versa?
I know that the shorter the wavelength the smaller the object you can image clearly. Why wavelength matters in imaging something? How having big wavelength wont let u image smaller object, like if u ...
-1
votes
1
answer
80
views
Why diffraction is not happening?
Recently i encountered a problem on the Young's Double Slit Experiment. The question was paragraph and had multiple sub-parts on the different variations of the experiment.
One of them was about what ...
- 241
2
votes
1
answer
111
views
Question on Babinet's principle example
Say we have the following mask (I drew it myself on paint):
I asked myself if it is possible to know the form of the image generated on a screen after the mask or know the electric field generated ...
- 75
0
votes
1
answer
45
views
General questions on the "big picture" of scalar diffraction theory
When studying diffraction, my courses at university stopped with frauenhofer diffraction, which - as far as I understand it - describes the diffracted far field for diffraction of a more or less ...
- 23
0
votes
0
answers
22
views
Babinet's principle, Arago point and Airy's disc
As far as I'm concerned, Arago's point is the central pattern we observe when we illuminate an opaque disc-like object, while an Airy disc is the pattern we obtain when passing light through a disc-...
- 1,629
0
votes
0
answers
25
views
Why in the experiment of double slits, in case of radiation of wavelength of red light, we can observe an envelop of the minimum?
I have made an experiment in which i have to measure the intensity of the light generated by an $\text{He-Ne}$ laser, in the case of two slits, I pretend to observe an interference lattice.
I have to ...
1
vote
0
answers
24
views
Fraunhofer diffraction from composite apertures
I'm trying to calculate the fraunhofer diffraction pattern from a aperture composed of multiple simple shapes, but I've ran into some trouble when trying to simulate the results and I really dont ...
0
votes
2
answers
66
views
Is refraction a special case of diffraction according to the book by Charles Kittel?
Wikipedia defines diffraction as -
Diffraction is the interference or bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/...
