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The angle of deviation of emergent light...

The angle of deviation of emergent light ray (BC) with respect to incident ray (OA) on glass sphere Is, as shown in figure.

A

2(i-r)

B

(i-r)

C

2(i+r)

D

i+r

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The correct Answer is:
A
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Knowledge Check

  • A light ray incidents at an angle 'i' on a plane mirror and undergoes reflection. Arrange the following steps in sequential order to calculate the angle of deviation of the light ray. (A) The angle between the incident ray and the extended light ray is 180^@ (B) In case of reflection, the angle of incidence (i) is equal to the angle of reflection (r). Then, the angle between the incident ray and the reflected ray is 2i. (C) Draw an imaginary line, extending the incident light ray, which represents the actual path of the light ray. (D) The angle of deviation is the angle between the reflected light ray and the actual path of the light ray, i.e., 180^@ - 2i

    A
    BADC
    B
    BCAD
    C
    BACD
    D
    CBDA

  • A ray of light enters a spherical drop of water of refractive index mu as shown in figure. Q. An expression of the angle between incident ray and emergent ray (angle of deviation) as shown in figure.

    A
    `0^(@)`
    B
    `phi`
    C
    `alpha-phi`
    D
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  • A ray of light falls on the surface of a spherical glass paper weight making an angle alpha with the normal and is refracted in the medium at an angle beta . The angle of deviation of the emergent ray from the direction of the incident ray is :

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    `(alpha - beta)`
    B
    `2(alpha - beta)`
    C
    `(alpha - beta)//2`
    D
    `(beta - alpha)`

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