All Questions
Tagged with refraction homework-and-exercises
95
questions
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Why would an object appear a different size when in water?
A friend of mine has a homework question and we're having some trouble figuring out what physical mechanisms come into play for this.
An underwater swimmer sees a spherical air bubble that appears ...
user24082
5
votes
1
answer
34k
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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. $R = 60cm$?...
- 185
4
votes
2
answers
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Why do we have minimum deviation angle in a Prism?
why do we have minimum deviation angle in a prism? I mean why does the angle of emergence first decreases, attains a minimum value and then increases.why?
- 290
4
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2
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Determining the refractive index of a foil
(59th Polish Olympiad in Physics, final stage, experimental part, 2010)
You have at your disposal:
a sample of blue foil of a homogeneous material, placed between two glass panes in a slide ...
- 567
4
votes
1
answer
62
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Path of sound in ocean where sound speed varies linearly with depth
In an ocean, described with $x-y$ Cartesian coordinates where $y=0$ on the sea bed, the sound speed varies linearly with $y$:
$$v(y)=c+by$$
A textbook says that, if sound wave is emitted on the sea ...
- 203
4
votes
1
answer
395
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Fermat's principle in exponential refraction [closed]
Determine path light will travel in a index of refraction described as $n(y)=1+be^{-ry}$. Let the light start off at the origin (0,0) and go to the point (L,0). Determine the equation that must be ...
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4
votes
2
answers
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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 ...
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3
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4
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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
3
votes
1
answer
201
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(How) can one use the concept of apparent depth to solve this ray-refraction problem?
I was solving the following question:
An observer can see through a small hole on the side of a jar (radius 15 cm) at a point at height of 15 cm from the bottom (see figure). The hole is at a height ...
3
votes
1
answer
239
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When are the reflectance R and the transmittance T equal to each other at normal incidence?
Really struggling with this one.
Under what conditions would the reflectance R and the transmittance T be equal to each other at normal incidence at an interface? What would be the values of R and T ...
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3
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2
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353
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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{...
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3
votes
1
answer
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Apparent depth and the viewing angle [closed]
Does the viewing angle of a person observing a coin placed in a bucket of water affect the apparent depth in any way?
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2
votes
1
answer
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Determining the path of a light ray
Let's consider a ray in the plane $xy$. Let the refractive index be defined in any point of the plane with the function $n(x,y)$.
In time $t=0$ the ray is located in coordinates $(x_0, y_0)$ and its ...
- 567
2
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3
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Problem on apparent height of postage stamp underneath paperweight
A postage stamp is placed on a surface and a glass cube of refractive index $1.5$ is placed over it. When observed through the cube, the stamp appears at a height of $1.5cm$ from the bottom of the ...
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