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A ray of light incident on a transparent sphere at an angle π4 and refracted at an angle r, emerges from the sphere after suffering one internal reflection. The total angle of deviation of the ray is

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Important Questions on Geometrical Optics

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 2>Q 11
A horizontal parallel beam of light passes through a vertical convex lens of focal length 20 cm and is then reflected by a tilted plane mirror so that it converges to a point I. The distance PI is 10 cm.
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M is a point at which the axis of the lens intersects the mirror. The distance PM is 10 cm. The angle which the mirror makes with the horizontal is
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 2>Q 12
In a car a rear view mirror having a radius of curvature 1.50 m forms a virtual image of a bus located 10.0 m from the mirror. The factor by which the mirror magnifies the size of the bus is close to
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 2>Q 13
The angle of a prism is 60°. When light is incident at an angle of 60° on the prism, the angle of emergence is 40°. The angle of incidence i for which the light ray will deviate the least is such that
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 2>Q 14
A concave lens made of material of refractive index 1.6 is immersed in a medium of refractive index 2.0. The two surfaces of the concave lens have the same radius of curvature 0.2 m. The lens will behave as a
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 2>Q 15
A ray of light incident parallel to the base PQ of an isosceles right-angled triangular prism PQR suffers two successive total internal reflections at the faces PQ and QR before emerging reversed in the direction as shown.
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If the refractive index of the material of the prism is μ, then:
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 2>Q 16
An optical device is constructed by fixing three identical convex lenses of focal lengths 10 cm each inside a hollow tube at an equal spacing of 30 cm each. One end of the device is placed 10 cm away from a point source. How much does the image shift when the device is moved away from the source by another 10 cm?
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 2>Q 17
An isosceles glass prism with angles 40° is clamped over a tray of water in a position such that the base is just dipped in water. A ray of light incident normally on the inclined face suffers total internal reflection at the base. If the refractive index of water is 1.33 then the condition imposed on the refractive index μ of the glass is
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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 2>Q 18
A point source of light is moving at a rate of 2 cms-1 towards a thin convex lens of focal length 10 cm along its optical axis. When the source is 15 cm away from the lens the image is moving at