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In the figure (a) the light is incident at an angle $θ$ (slightly greater than the critical angle). Now keeping the incident ray fixed a parallel slab of refractive index $n_{3}$ is placed on surface $A B$ (fig b)

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Important Questions on Geometrical Optics

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KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 1>Q 34

An equilateral prism deviates a ray through

40 °

for two angles of incidence differing by

20 °

. The possible angles of incidence is

MEDIUM

KVPY Aptitude Test - Stream SA

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 1>Q 35

A man is sitting in a room at

2 m

from a wall

W_{1}

wants to see the full height of the wall

W_{2}

behind him

4 m

high and

6 m

away from the facing wall

W_{1}

. What is the minimum vertical length of mirror on the facing wall required for the purpose?

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 1>Q 36

A flint glass prism and a crown glass prism are to be combined in such a way that the deviation of the mean ray is zero. The refractive index of flint and crown glasses for the mean ray are

1.6

and

1.9

, respectively. If the refracting angle of the flint prism is

6 °

, what would be the refracting angle of crown prism?

EASY

KVPY Aptitude Test - Stream SA

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 1>Q 37

A plane mirror is moving with velocity

4 \hat{i} + 5 \hat{j} + 8 \hat{k}

. A point object in front of the mirror moves with a velocity

3 \hat{i} + 4 \hat{j} + 5 \hat{k}

. Here

\hat{k}

is along the normal to the plane mirror and facing towards the object. The velocity of the image is:

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KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 1>Q 38

Alight wave travels from glass to water. The refractive index for glass and water are

\frac{3}{2}

and

\frac{4}{3}

, respectively. The value of the critical angle will be

EASY

KVPY Aptitude Test - Stream SA

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 1>Q 39

When a beam of light goes from denser medium

(μ_{d})

to rarer medium

(μ_{r})

, then it is generally observed that magnitude of angle of incidence is half that of angle of refraction. Then magnitude of incident angle will be (here

μ = \frac{μ_{d}}{μ_{r}}

)

EASY

KVPY Aptitude Test - Stream SA

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 1>Q 40

The image for the converging beam after refraction through the curved surface is formed at

Question Image

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 15 - Geometrical Optics>Exercise 1>Q 41

A thin linear object of size

1 mm

is kept along the principal axis of a convex lens of focal length

10 cm

. The object is at

15 cm

from the lens. The length of the image is

In the figure (a) the light is incident at an angle θ (slightly greater than the critical angle). Now keeping the incident ray fixed a parallel slab of refractive index n3 is placed on surface AB (fig b)

Important Questions on Geometrical Optics

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In the figure (a) the light is incident at an angle $θ$ (slightly greater than the critical angle). Now keeping the incident ray fixed a parallel slab of refractive index $n_{3}$ is placed on surface $A B$ (fig b)