Refraction Through a Prism

Author:Embibe Experts
WBJEE
IMPORTANT

Important Questions on Refraction Through a Prism

HARD
IMPORTANT

The refractive index for a prism is given as μ=cotA2. Then, angle of minimum deviation in terms of angle of the prism is

MEDIUM
IMPORTANT

A ray PQ incident on the refracting face BA is refracted in the prism BAC as shown in the figure and emerges from the other refracting face AC as RS such that, AQ=AR. If the angle of prism A=60° and the refractive index of the material of prism is 3, then the angle of deviation of the ray is

Question Image

MEDIUM
IMPORTANT

If a thin prism of glass is dipped in water then minimum deviation (with respect to air) of light produced by prism will be μga=32, aμw=43

MEDIUM
IMPORTANT

For a prism kept in air, it is found that for an angle of incidence 60°, the angle of prism A, angle of deviation δ and angle of emergence 'e' become equal. Then the refractive index of the prism is

EASY
IMPORTANT

Minimum deviation is observed with a prism having angle of prism A, angle of deviation ,δ angle of incidence i and angle of emergence δ. We then have generally

MEDIUM
IMPORTANT

A ray of light passes through an equilateral prism such that the angle of incidence is equal to the angle of emergence and the latter is equal to 34th of angle of prism. The angle of deviation is

EASY
IMPORTANT

If one face of prism is silvered having prism angle 30° and μ=2. What will be the angle of incidence, so that the incident ray retraces its path? 

EASY
IMPORTANT

When a glass prism of refracting angle 60° is immersed in a liquid, its angle of minimum deviation is 30°. The critical angle of glass with respect to the liquid medium is

EASY
IMPORTANT

Refractive index of a prism is 7/3 and the angle of prism is 60°. The minimum angle of incidence of a ray that will be transmitted through the prism is

EASY
IMPORTANT

The refractive index of a glass is 1.520 for red light and 1.525 for blue light. Let D1 and D2 be angles of minimum deviation for red and blue light respectively in a prism of this glass. Then,