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The face PR of a prism PQR of angle 30° is silvered. A ray is incident on face PQ at an angle of 45° as shown in figure. The refracted ray undergoes reflection on face PR and retraces its path. The refractive index of the prism is

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Important Questions on Geometric Optics

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JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 106
A ray is incident at an angle of incidence i on one surface of a prism of small angle A and emerges normally from opposite surface. If the refractive index of the material of prism is μ, the angle of incidence i is nearly equal to
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JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 107

A ray falls on a prism ABCAB=BC and travels as shown in figure. The minimum refractive index of the prism material should be

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JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 108
White light is passed through a prism              colour shows maximum deviation.
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JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 109
The angle of prism is 30°. The rays incident at 60° at one refracting face suffer a deviation at 30°. The angle of emergence is
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JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 110
The focal length of a thin convex lens for red and blue colours is 100.5 cm and 99.5 cm. The dispersive power of the lens is
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JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 111
When a ray of light is incident normally on one refracting surface of an equilateral prism, (refractive index of the material of the prism is 1.5)
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 112
The angle of minimum deviation for a prism of refractive index 1.5 is equal to the angle of the prism. The angle of prism is (Given, cos41°=0.75)
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 7 - Geometric Optics>Objective Problems [Level 1]>Q 113
A ray of light passing through a prism of refracting angle 60° has to deviate by at least 30°. Then, refractive index of prism should be