All Questions
Tagged with refraction homework-and-exercises
95
questions
3
votes
4
answers
630
views
Refraction of light through a slab of variable refractive index
Here I am posting a question of Jee Adv. 2023 based on refraction.
A monochromatic light wave is incident normally on a glass slab of
thickness 𝑑, as shown in the figure. The refractive index of the ...
- 109
1
vote
1
answer
70
views
Snell's Law- Extraordinary ray
I applied the snell's law to find the angle of refraction of the Ordinary and Extraordinary ray. And I got the correct answer 3.51. But I know my approach to the question is wrong because I applied ...
1
vote
0
answers
32
views
Refraction of light - Huygens' Principle
To elucidate the rationale behind the bending of light as it transitions between different mediums, Huygens' principle is predominantly employed. The procedure, as demonstrated in this video (link: ...
- 11
2
votes
2
answers
130
views
Do Normal Incidence contradicts the definition of refraction?
Professor told our class that if someone wants to define refraction in words, it can be done as the following, The deviation of light from its path when it passes from one medium to another is called ...
user380777
1
vote
0
answers
23
views
I need to figure out the length of a crystal to move a light beam [closed]
I need to figure out the length of a crystal to move a light beam shining through it.
The height is known, and so is the refractive index of the crystal and its length. What I can't figure out is the ...
- 119
0
votes
1
answer
59
views
Refraction of light with different wavelengths [closed]
A red light and blue light enter a rectangular glass block normal to its surface at the same time. Strictly speaking, after passing through the block, which pulse exits first?
Should I consider their ...
- 13
1
vote
1
answer
34
views
Why is the time taken for light propagation between two points in anisotropic media independent of $y$?
Background
Light propagating in an anisotropic medium does not (in general) take a straight-line path between two points. The propagation time between those points, then, is dependent on the total ...
0
votes
1
answer
338
views
How to derive Fresnel's tangent law?
In this Wikipedia post the $r_p$ Fresnel reflection coefficient is given by:
$$r_p = \frac{\tan{(\theta_i - \theta_t)}}{\tan{(\theta_i + \theta_t)}}.$$
How can this be derived from the previous ...
- 2,101
1
vote
1
answer
134
views
Is it true to say no refraction takes place when a ray comes along normal drawn to interface?
Many books and websites in our country say that there are two conditions for no refraction of light:
If index of Refraction of media on both sides is same.
If the ray of light falls normally on the ...
- 1,357
0
votes
2
answers
58
views
On a minima problem in optics
I have trodding through a calculus textbook, more specifically — through a chapter on the methods of obtaining the extrema of functions using derivatives, including certain problems in optics (Fermat’...
- 101
3
votes
2
answers
349
views
Question about a specific geometrical optics/Fermat's principle problem and it's given solution
I'm studying the following question
P119 On a spherical planet, the refractive index of the atmosphere, as a function of altitude $h$ above the surface, varies according to the formula
$$n(h) = \frac{...
- 83
0
votes
1
answer
321
views
Behavior of a laser beam in a spherically symmetric medium [closed]
A laser beam propagates through a spherically symmetric medium. The refractive index varies with the distance from the centre of symmetry $r$ according to the equation:
$$
\mu=\mu_0\frac{r}{r_0}
$$
...
1
vote
1
answer
171
views
Appearance of underwater light source to an observer [closed]
I came across this question
A lightsource of diameter 10cm is placed 2m underneath the surface of a pool, a person
5m away from the edge of the pool saw a circle of light emitting from the lamp.
...
- 133
0
votes
0
answers
92
views
What is the angle of incidence in the following exercise?
Would like to verify which is the incident ray of light in this exercise
According to provided solution the incidence ray is the top one and the correct angle of incidence is equals 60 degree (90 - 30 ...
- 101
0
votes
1
answer
53
views
How can the image be any size orher than the object?
Am image is just the set of images of all the points on the thing. The complete image has to be the same size as the object if there is exactly one image for each point on the object forming it. So an ...
- 51