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3 votes
4 answers
5k views

A lens inside a liquid is not visible. Why? [closed]

Are lenses inside liquid water invisible?
Cynthia's user avatar
  • 71
2 votes
1 answer
255 views

Problem on speed of light in a refractive medium

Here's the problem: A beam of light moves in a slab of refractive index n in positive x direction. The slab itself is also moving in the positive x direction with respect to the lab frame. What is the ...
BB_'s user avatar
  • 81
4 votes
2 answers
132 views

Time taken to reach from one point to another in refraction [closed]

According to Fermat's principle, path taken between two points by a ray of light is the path that can be traversed in the least time. Suppose the source of light is point $(x_1, y_1)$ and speed of ...
eager's user avatar
  • 51
0 votes
1 answer
4k views

How do I find the constants in Cauchys equation for index of refraction for different wavelengths?

Im trying to find the indexes of refraction for my Dispersion of a Glass Prism lab. Specifically I need to use Cauchy's equation to find the index of refraction for different wavelengths. $$ n=a+\...
kal's user avatar
  • 57
-1 votes
1 answer
96 views

How I can prove refractive index in an environment is this? [closed]

in "Applied Quantum Mechanics" by A.F.J. Levi, is a problem that I couldn't solve it can any solve it: if electrical filed is: $$ \mathbf{E}\left(\mathbf{r}, \omega \right) =\mathbf{E}_{0}\left(\...
stackprogramer's user avatar
1 vote
1 answer
7k views

Calculating angle of min deviation of prism [closed]

Two rays incident with angle 40 and 60 on one face of equilateral triangular prism the angle of deviation are equal .find angle of minimum deviation?
Dr-Wael Ashour's user avatar
-1 votes
2 answers
705 views

Apparent depth is supposed to be independent of viewing angle but this seems inconsistent with critical angle refraction

When rays from the object at some depth are draw so as to be incident at the critical angle (or some angle just lower) the ray is refracted along the surface. Retracing this line would give you an ...
Amit Reddy's user avatar
-5 votes
1 answer
244 views

Does this picture look wrong to anyone else? [closed]

There is a typo. One which obfuscates the main point and makes it difficult for anyone unfamiliar with the problem to deduce the answer.
Andrew Stockham's user avatar
1 vote
1 answer
178 views

Reflective angles from a CD [closed]

How do I estimate the diffraction angles of laser light which illuminates a CD? Does the storage capacity have an impact? Theories I have considered are: refraction diffraction $\sin(\theta)=\frac \...
darren's user avatar
  • 107
-2 votes
1 answer
191 views

Calculating angle of refraction of water in this lab setup? [closed]

The setup of the experiment is as drawn in the picture (where the red circle is a rotating disk, the box is a laser and the straight line the laser beam and the semi circle in the middle of the ...
user3572917's user avatar
5 votes
1 answer
34k views

How to determine the radius of curvature of a convex lens?

Suppose there is an equi-convex lens made of glass which has a focal length ($f$) of 30cm. Then, can we not say that the radius of curvature, $R$ of the lens is twice the focal length, i.e. $R = 60cm$?...
agdhruv's user avatar
  • 185
1 vote
0 answers
156 views

Aquarium/refractive indices/detector

Quick question: I'm currently fiddling around with this homework of mine and I seem to be lacking some basic optics knowledge apparently. An aquarium is filled with a fluid as seen in the figure ...
Rab's user avatar
  • 277
1 vote
1 answer
268 views

Refraction under water

I have difficulties visualizing following task A diver is $d = 10 m$ below the water surface ($n_{water} = 1.33$). What is the diameter of the circle through which the diver can see the sky? ...
mike's user avatar
  • 121
0 votes
1 answer
2k views

Angle of minimum deviation

A prism of angle $60^\circ$ deviates a ray of light through $40^\circ$ for two angles of incidence which differ by $11^\circ$. What is the refractive index of the glass of the prism? If we are given ...
Mahathi Vempati's user avatar
2 votes
1 answer
3k views

Path of a light ray in a medium of varying refractive index [closed]

How do we get the equation for the path of a light ray in a medium of varying refractive index. I can draw a rough sketch, but don't know how do we get the exact curve. I encountered this while ...
Sudhanshu's user avatar
  • 117

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