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Questions
Write the basic cause of refraction of light.
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Solution
RELATED QUESTIONS
Write a relationship between the angle of incidence and angle of refractions for a given pair of media
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What do you understand by the statement the refractive index of glass is 1.5 for white light?
In fig 4.18, name the ray which represents the correct path of light while emerging out through a glass block.
A coin is places at the bottom of a beaker containing water (refractive index = 4/3) to a depth of 12 cm. By what height the coin appears to be raised when seen from vertically above?
The critical angle for glass-air is 45° for the light of yellow colour. State whether it will be less than, equal to, or more than 45° for (i) ref light, (ii) blue light?
“A ray of light incident on a rectangular glass slab immersed in any medium emerges parallel to itself.” Draw labelled ray diagram to justify the statement.
While tracing the path of a ray of light passing through a rectangular glass slab a student tabulated his observations as given below:
|
S.NO. |
∠i |
∠r |
∠e |
|
I |
60° |
40° |
61° |
|
II |
50° |
36° |
51° |
|
III |
40° |
28° |
39° |
|
IV |
30° |
20° |
31° |
The correct observations is:
(A) I
(B) II
(C) III
(D) IV
Four students showed the following traces of the path of a ray of light passing through a rectangular glass slab.
The trace most likely to be correct is that of student
(A) I
(B) II
(C) III
(D) IV
Observe the figure and write accurate conclusion regarding refraction of light.
-
- the angle of refraction and
- the angle of deviation for the ray?
Draw a ray diagram showing the lateral displacement of a ray of light when it passes through a parallel sided glass slab.
State the factors on which the angle of deviation depends.
State the relation between the refractive index μ and the velocity of light (vm) in that medium.
Express the refractive index μ of a medium in terms of the velocity of light.
Light passes through a rectangular glass slab and through a triangular glass prism. In what way does the direction of the two emergent beams differ and why?
The diagram shows the path of a ray of light through a rectangular glass block placed in a liquid of uniform density.
What is the angular, deviation of the emergent ray from the glass block with respect to the incident ray?
Write the approximate values of speed of light in (i) air and (ii) glass. Use these values to calculate the refractive index of glass with respect to air.
