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Class XII Physics Ray Optics 6

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Question 1

A prism of refractive index and refracting angle A produces minimum deviation δ_m of a ray on one face at an angle of incidence 45 °, The values of A and δ_m are respectively.

Question 2

The graph between angle of deviation (δ) and angle of incidence (i) for a triangular prism is represented by:

Question 3

In an experiment for determination of refractive index of glass of a prism by i − δ, plot, it was found that a ray incident at angle 35°, suffers a deviation of 40° and that it emerges at angle 79°. In that case which of the following is closest to the maximum possible value of the refractive index?

Question 4

A light ray is incident perpendicular to one face of a 90° prism and is totally internally reflected at the glass-air interface. If the angle of reflection is 45°, we conclude that the refractive index n

Question 5

Calculate the dispersive power for crown glass from the given data μ_v = 1.5230, μ_r = 1.5145

Question 6

A beam of light consisting of red, green and blue colours is incident on an isosceles right angled prism as shown in the figure .The refractive indices of the material of the prism for red, green and blue colours are 1.39,1.43 and 1.47 respectively. The prism will –

Question 7

A ray is incident at an angle of incidence "i" on one face of a prism of small angle A and emerges normally from the opposite surface. If the refractive index of the material of the prism is μ, the angle of incidence i is nearly equal to:

Question 8

A glass prism has μ = 1.5 and the refracting angle is 90 °. If a ray falls on it at angle of incidence of 30 ° then what will be the angle of emergence:

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Mar 27JEE & BITSAT