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STATEMENT-1 : There exists two angles of incidence for the same deviation (except minimum deviation) by a prism kept in air.
STATEMENT-2 : This is due to principal of reversibility of light

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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

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

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?

MEDIUM

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

The refracting angle of prism is

A

and refractive index of material of prism is

\cot \frac{A}{2}

. The angle of minimum derivation is

EASY

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

A ray of light is incident at an angle of

60^{\circ}

on one face of a prism of angle

30^{\circ}

. The emergent ray of light makes an angle of

30^{\circ}

with incident ray. The angle made by the emergent ray with second face of prism will be:

MEDIUM

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

A certain prism produces a minimum deviation of

42 ° .

It produces a deviation of

45 °

when the angle of incidence is either

43 °

62 ° .

The angle of incidence when the prism undergoes minimum deviation is

EASY

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

Monochromatic light passes through a prism. Compared to that in air, inside the prism the light's

HARD

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

A ray of light falls upon a

60 °

prism

(μ = \sqrt{2})

and it suffers minimum deviation. The angle of incidence for this ray must be

HARD

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

A glass prism has a right-triangular cross section,

A B C

, with

∠ A = 90 °

. A ray of light parallel to the hypotenuse,

B C

and, incident on the side,

A B

emerges grazing the side,

A C

. Another ray, again parallel to the hypotenuse,

B C

, incident on the side,

A C

suffers total internal reflection at the side,

A B

. Which one of the following must be true about the refractive index,

μ

of the material of the prism?

EASY

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

A prism is made up of material of refractive index

\sqrt{2} .

The angle of the prism is

A

. If the angle of minimum deviation is equal to the angle of the prism, the value of

A

HARD

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

Consider two equivalent, triangular hollow prisms A and B made of thin glass plates and arranged with negligible spacing as shown in the figure. A beam of white light is incident on prism A from the left. Given that, the refractive index of water is inversely related to temperature, the beam to the right of prism B would not appear white, if

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

The angle of prism and refractive index of the material of the prism are A and

\cot \frac{A}{2}

respectively. The angle of minimum deviation of the prism is

EASY

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

A certain prism is found to produce a minimum deviation of

38 °

. It produces a deviation of

44 °

when the angle of incidence is either

42 °

62 °

. What is the angle of incidence when it is undergoing minimum deviation?

MEDIUM

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

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to

\frac{3}{4}

of the angle of the prism. The angle of deviation is

EASY

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

' A'

is the angle of prism,

r

angle of refraction, then the condition for minimum deviation is

MEDIUM

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

A equiangular glass prism of Refractive Index

1.6

is kept fully immersed in water of refractive index

\frac{4}{3}

for a certain ray of monochromatic light. What is the closest value for the angle of minimum deviation of the light ray in this setup? (Take

\sin 37 ° = 0.6

)

HARD

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

A rectangular block is composed of three different glass prisms (with refractive indices $μ_{1}, μ_{2} a n d μ_{3}$ ) as shown in the figure below. A ray of light incident normal to the left face emerges normal to the right face. Then the refractive indices are related by

Question Image

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

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:

STATEMENT-1 : There exists two angles of incidence for the same deviation (except minimum deviation) by a prism kept in air. STATEMENT-2 : This is due to principal of reversibility of light

Important Questions on Ray Optics and Optical Instruments

Learn and Prepare for any exam you want !

STATEMENT-1 : There exists two angles of incidence for the same deviation (except minimum deviation) by a prism kept in air.
STATEMENT-2 : This is due to principal of reversibility of light