Refraction through a Prism

IMPORTANT

Refraction through a Prism: Overview

This topic covers concepts such as Prism, Deviation by Prism, Condition for Minimum Deviation in Prism, Deviation versus Incident Angle Graph in Prism, and Refractive Index Formula for Prism.

Important Questions on Refraction through a Prism

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A prism has a refractive index 3 2 and refracting angle 90°. Find the minimum deviation produced by prism

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A ray incident at angle 53o on a prism emerges at an angle at 37o as shown. If the angle of incidence is made 50o, which of the following is a possible value of the angle of emergence.

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A parallel beam of light falls normaly on the first face of a prism of small angle. At the second face it is partly transmitted and partly reflected, the reflected beam striking at the first face again, and emerging from it in a direction making an angle 6o 30' with the reversed direction of the incident beam. The refracted beam is found to have undergone a deviation of 1o 15' from the original direction. Find the refractive index of the glass and the angle of the prism.

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The refractive indices of the crown glass for violet and red lights are 1.51 and 1.49 respectively and those of the flint glass are 1.77 and 1.73 respectively. A prism of angle 6° is made of crown glass. A beam of white light is incident at a small angle on this prism. The other thin flint glass prism is combined with the crown glass prism such that net mean deviation is 1.5° anticlockwise.
A screen is placed normal to the emerging beam at a distance of 2 m from the prism combination. Find the distance between red and violet spot on the screen. Which is the topmost colour on screen.

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A ray of light undergoes deviation of   30°  when incident on an equilateral prism of refractive index   2 . What is the angle subtended  by the ray inside the prism with the base of the prism is ?

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A given ray of light suffers minimum deviation in an equilateral prism P. Additional prism Q and R of identical shape and of the same material as P are now added as shown in the figure. The ray will now suffer

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A given ray of light suffers minimum deviation in an equilateral prism P. Additional prism Q and R of identical shape and of the same material as P are now added as shown in the figure. The ray will now suffer

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Prove that μ= sinA+δm2sinA2.

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A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 34th of the angle of the prism. The angle of deviation is 

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A light ray incidents normally on one surface of an equilateral prism. The angle of deviation of the light ray is (Refractive index of the material of the prism =2 )

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

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What is the relation between i and e when a prism is in the position of minimum deviation? 

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If the yellow light is refracted by a prism at an angle of minimum deviation then-

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A ray passes through an equilateral glass prism such that i=e, which is 3/4 of the prism angle. Then deviation will be -

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The graph is plotted between the angle of deviation δ and angle of incidence i for a triangular prism is represented by which of the following:

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A thin isosceles prism with angle 4º and refractive index 1.5 is placed inside a transparent tube with water (refractive index =54 ) as shown. The deviation of light whether upward or downward due to prism will be in degree is ….. × 10–1.
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A certain thin prism is found to produce a minimum deviation of 40o and produces a deviation of 44º when the angle of incidence is either 42o or 62o. The angle of incidence when light undergoes minimum deviation in degree is,

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Cross section of a glass prism has the form of an equilateral triangle. A ray is incident onto one of the faces perpendicular to it. Angle ϕ between the incident ray and the ray that leaves the prism in degree is ………× 60º. The refraction index of glass is 1.5.

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A ray of light is incident at 60° on one face of a prism of angle 30° and the emergent ray makes 30° with the incident ray. The refractive index of the prism is 

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For a glass prism (μ=3) the angle of minimum deviation is equal to the angle of the prism. The angle of the prism is