EASY

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An equilateral prism produces an angle of deviation $60 °$ when the angle of incidence is $60 °$ . The angle of deviation produced when the ray is incident normal to the surface is

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Important Questions on Ray Optics and Optical Instruments

EASY

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

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

MEDIUM

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

A ray

P Q

incident on the refracting face

B A

is refracted in the prism

B A C

as shown in the figure and emerges from the other refracting face

A C

R S

such that

A Q = A R .

If the angle of prism

A = 60^{o}

and the refractive index of the material of prism is

\sqrt{3}

, then the angle of deviation of the ray is

Question Image

HARD

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

In an experiment for determination of refractive index of glass of a prism by

i

v/s

δ

plot, it was found that a ray incident at angle

35^{o}

, suffers a deviation of

40^{o}

and that it emerges at angle

79^{o}

. In that case which of the following is closest to the maximum possible value of the refractive index?

HARD

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

Monochromatic light is incident on a glass prism of angle A. If the refractive index of the material of the prism is

μ

, a ray, incident at an angle

θ

, on the face AB would get transmitted through the face AC of the prism provided:

Question Image

EASY

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

The graph between angle of deviation

(δ)

and angle of incidence

(i)

for a triangular prism is represented by :

EASY

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

A ray is incident at an angle of incidence

i

on one surface of a small angle prism (with angle of prism

A

) and emerges normally from the opposite surface. If the refractive index of the material of the prism is

μ

, then the angle of incidence is nearly equal to:

EASY

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

A thin prism having refracting angle

10^{o}

is made of glass of refractive index 1.42. This prism is combined with another thin prism made of glass of refractive index 1.7. This combination produces dispersion without deviation. The refracting angle of second prism should be

EASY

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

A thin prism

P_{1}

with angle

4 °

and made from glass of refractive index

1.54

is combined with another thin prism

P_{2}

made from glass of refractive index

1.72

to produce dispersion without deviation. The angle of prism for

P_{2}

MEDIUM

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

What is the required condition, if the light incident on one face of a prism, does not emerge from the other face?

EASY

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

The refracting angle of a prism is

A

, and refractive index of the material of the prism is

\cot (\frac{A}{2})

. The angle of minimum deviation is

MEDIUM

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

The focal length of a thin convex lens for red and blue rays are

100 cm

and

96.8 cm

respectively. Then, the dispersive power of the material of the lens is

EASY

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

The angle of incidence for a ray of light at a refracting surface of a prism is

45^{o}

. The angle of prism is

60^{o}

. If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are:

MEDIUM

Physics>Optics>Ray Optics and Optical Instruments>Refraction through a Prism

The refracting angle of prism is