All Questions
21
questions
2
votes
0
answers
85
views
What will I see if I look through a diffraction grating? [closed]
The problem comes from a past exam, which is apparently causing a lot of
confusion between my classmates and teacher. I'll put a slightly paraphrased
version here:
Light of a single wavelength from ...
- 21
0
votes
1
answer
350
views
Finding angles of second and third order minima given only angle of first order minimum
For the following problem we are asked to find the second and third order minimums of a single slit diffraction experiment at $13^{\circ}$. I tried using the following $$\theta_p=p\cdot\frac{\lambda}{...
- 101
0
votes
2
answers
181
views
What is the minimal size the slit should have in order for an interference pattern to occur? [closed]
Consider the single slit experiment. The width of the slit can be given as:
$b= \frac{\lambda}{2} * \frac {1}{\sin(\theta)} $, where $\theta$ is the angle for the first minimum is.
At which minimal ...
- 361
0
votes
0
answers
615
views
What are some physical applications of rectangular aperture Fraunhofer diffraction?
I have first provided a simple explanation of Fraunhofer diffraction for rectangular aperture, feel free to skip this entire quoted section to the question below if you already know about the topic.
...
- 101
0
votes
0
answers
28
views
Problem regarding diffraction
In the case of single slit diffraction, is it necessary that the distance between slits must be less or equal than the wavelength of light in order to calculate angular width of dark fringes?
I got ...
- 11
1
vote
1
answer
5k
views
Maximum diffraction order on diffraction grating
So, I'm given a certain wavelength $\lambda$ and the grating costant $d$ (distance between slits). I'm asked to find the maximum order of diffraction for this set of data. In general, when light falls ...
- 531
0
votes
1
answer
140
views
Explanation of problem 2074 in Lim-Yung-Kuo's Problems and solutions in Optics
A pinhole camera consists of a box in which an image is formed on the film plane which is a distance P from a pinhole of diameter d. The object is at a distance L from the pinhole, and light of ...
- 63
2
votes
1
answer
95
views
A geometrical calculation in Fresnel's paper "Memoir on the diffraction of light" 1819
It is a geometrical problem which I find difficult to solve reading the Fresnel's paper "Memoir on the diffraction of Light".
According to the figure Fresnel sets $z$ as the distance of the element $...
- 155
-1
votes
1
answer
328
views
Effect of two lenses after single diffraction grating
I am having problems undestanding the effect of two lenses after a diffraction grating of slits whose separation is unknown.
The setup is like this: 3cm away from the slits there's a convergent lens ...
3
votes
1
answer
866
views
Fraunhofer diffraction due to a rectangular aperture?
I have an aperture of length a and width b (sizes are comparable) How do I calculate the irradiance for a point on the screen? I know that I should calculate the electric field due to an element of ...
- 187
1
vote
0
answers
387
views
Fraunhofer diffraction at circular aperture - integration of bessel function
I'm trying to understand the calculation here: http://en.wikipedia.org/wiki/Fraunhofer_diffraction_(mathematics)#Circular_aperture
for the solution by integration, but I plain and simple fail to see ...
- 131
5
votes
1
answer
2k
views
Diffraction pattern without a slit
A few weeks ago, I aimed a laser at a wire perpendicular and interestingly, I saw the diffraction pattern, like the picture below:
Why is this happening? I mean, I don't have any slits and I'm aiming ...
- 765
0
votes
1
answer
132
views
Path length requirement for diffraction problem [closed]
The following question has been asked in a problem sheet I have been asked to answer:
"The above diagram relates to the path lengths of radiation, with an angle of incidence,
θ, reflecting off ...
- 349
1
vote
0
answers
424
views
Bandpass of diffraction grating - exit slit width?
I'm supposed to derive a relation for the range of wavelengths that's being transmitted by a spectrometer (bandpass) in terms of the dispersion, focal length and exit slit width.
Given grating is $...
- 933
1
vote
0
answers
1k
views
Fabry Perot Etalon - changing wavelength and plate distance
Given reflectivity $R = 0.75$, an etalon is used as an interference filter, transmitting light of wavelength $4.3\mu m$ at normal incidence. The full width half maximum is about $\Delta \lambda = 0.2 \...
- 933