All Questions
110
questions
1
vote
3
answers
213
views
Diffraction grating from reflection
We had an experiment in our physics lab where we used two grating materials one with 2500 lpi(say A) and the other with 15000lpi(say B).
Now when we shine white light on both of them we didn't get any ...
- 8,230
2
votes
4
answers
86
views
Diffraction proof
I am talking about the way we generally explain the occurence of bright and dark fringes during diffraction. When we want to show a dark fringe we consider a pair of secondary light sources who have a ...
0
votes
2
answers
66
views
Is the Huygens' principle consistent for intersecting wavefronts?
When refraction takes place at the interface of two media, wavefronts can be extended to intersect as below:
At point of intersection, light requires no time to travel between the wavefronts. However,...
0
votes
0
answers
119
views
Minimum intensity fringes are not perfectly dark in diffraction pattern?
I am studying Interference and Diffraction and everywhere I look it is written that "In an interference pattern,the minima are usually perfectly dark while in a diffraction pattern they are not ...
0
votes
0
answers
31
views
Equating scalar summation of electric field to electric field at maxima in single slit diffraction
I was going through the standard derivation of intensity distribution in case of single slit diffraction
I don't understand why we equate the scalar summation of electric field phasors(or the length ...
- 5
2
votes
0
answers
578
views
How does the intensity of light in a double slit experiment vary with the slit width?
I know this question has been asked quite a few times on the network but I still can't find a concrete answer. It's quite clear that intensity depends on the square of slit width in a single slit ...
- 21
0
votes
1
answer
109
views
What is the equation that gives $a$ and $b$ of the elliptical polarization formed by two interfering linearly polarized waves?
Two linearly polarized light waves have amplitudes $A1$ and $A2$, the same wavelength, a phase difference of $p$, and an angle difference of $\theta$.
When two linearly polarized light waves with ...
- 103
4
votes
2
answers
335
views
Does light from incoherent source interfere?
We say that for us to observe interference we use coherent source but even if we use non coherent source light should still interfere, right?
0
votes
1
answer
36
views
Book for thin film interference in optics
So i need to study a topic of optics which is thin film interference and i couldn't find a good book on the topic that would explain the necessary formulae derivations and contains rigorous ...
0
votes
1
answer
132
views
Confusion about Huygens Principle
According to Huygens Principle, the direction of propagation of waves will be perpendicular to the wavefronts. But I have Confusion in Fraunhofer's Diffraction due to Single Slit. Have a look in the ...
- 121
2
votes
0
answers
51
views
The fundamental relation between interference and diffraction [duplicate]
high schooler here.i was not convinced by the validity of the huygens secondary wavelets hypothesis and beleived that both interference and diffraction should arise from the simple wave equation $A=...
- 45
-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
1
vote
1
answer
455
views
"Time travel" difference in double slit experiment
In double slit experiment, as in following figure
We calculate the relative phase via $$\Delta \phi_0 = \frac{2\pi \delta}{\lambda} $$ where $\delta$ denote the two path distance difference in figure,...
- 1,421
-1
votes
2
answers
572
views
Which is the real reason for why we don't see light interference patterns?
There are many questions like mine in the web, but think I cannot fully understand it.
Let's look at this question. The first answer states that we cannot see light interference patterns because most ...
- 1,319
2
votes
2
answers
108
views
Interference or diffraction? [duplicate]
Suppose I have $N$ slits separated by a distance $a$. We are sending a light source of wavelength comparable to the slit width. Then which of the effect should dominate: Interference or diffraction?
...
- 1,348