Home
Class 12
PHYSICS
The prism shown in figure has a refracti...

The prism shown in figure has a refractive index of `1.60` and the angles A are `30^@.` Two light rays P and Q are parallel as they enter the prism. What is the angle between them after they emerge? `[sin^-1(0.8)=53^@]`

Text Solution

Verified by Experts

The correct Answer is:
D

`mu=sin i/sin 30^@`
`:. sin i=mu sin 30^@`
`=(1.6)(1/2)=0.8`
`:. i= 53^@`
P ray deviates from its original path by an angle,
`delta=i-30^@=23^@`

`:.` Angle between two rays, `theta=2 delta`
`=46^@`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Level 1 Assertion And Reason|13 Videos

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Level 1 Objective|38 Videos

  • REFRACTION OF LIGHT

    DC PANDEY|Exercise Exercise 31.7|2 Videos

  • REFLECTION OF LIGHT

    DC PANDEY|Exercise Subjective|9 Videos

  • SEMICONDUCTORS

    DC PANDEY|Exercise Subjective|12 Videos

Similar Questions

Explore conceptually related problems

(a) Draw the ray diagram showing refraction of ray of light through a glass prism. Derive the expression for the refractive index n of the material of prism in terms of the angle A ray angle of minimum deviation delta_m (b) A ray of light PQ enters an isosceles right angles prism ABC of refractive index 1.5 as shown in figure . (i) Trace the path of the ray through the prism . (ii) What will be the effect on the path of the ray if refractive index of the prism is 1.4 ?

An equilateral prism of unknown refractive index has a prism angle A. A light ray incident at an angle 0.8 A suffers minimum deviation. What will be the speed of light inside the prism ?

Knowledge Check

  • Two parallel light rays are incident at one surface of a prism of refractive index 1.5 . What is the angle between the rays as they emerge? sin^-1(0.75)=48.5^@

    A
    `19^@`
    B
    `37^@`
    C
    `45^@`
    D
    `30^@`

  • An isosceles prism of angle 120degree has a refractive index 1.44. Two parallel monochromatic rays enter the prism parallel to each other in air as shown. The rays emerge from the opposite faces

    A
    are parallel to each other
    B
    are diverging
    C
    make an angle `2[sin^-1(0.72)-30degree]` with each other
    D
    make an angle `2 sin^-1 (0.72)` with each other

  • A glass prism has a refractive angle of 90^(@) and a refractive index of 1.5. A ray is incident at an angle of 30^(@) . The ray emerges from an adjacent face at an angle of

    A
    `60^(@)`
    B
    `30^(@)`
    C
    `45^(@)`
    D
    the ray does not emerge

    • Similar Questions

    Explore conceptually related problems

    A monochromatic ray of light strikes one face of a prism at an angle of 60^(@) and the angle of refraction is 30^(@) . The refracting angle of the prism is 60^(@) . What is the angle of emergence ?

    If a light ray incidents normally on one of the faces of the prism of refractive index 2 and the emergent ray just grazes the second face of the prism, then the angle of deviation is

    The angle of prism is 60^(@) and its refractive index is 1.5. There will be no emergent light if the angle of incidence on the first face is

    Refractive index of a prism is sqrt(7//3) and the angle of prism is 60^(@) . The minimum angle of incidence of a ray that will be transmitted through the prism is

    A ray of light is incident at an angle of 60^(@) on one face of a prism of angle 30^(@) . They ray emerges normally from the other face of the prism. The refractive index of the prism material is

    Home
    Profile