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The angle between the incident and the e...

The angle between the incident and the emergent ray from a glass slab is

A

`90^(@)`

B

`0^(@)`

C

less than `90^(@)`

D

more than `90^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • A ray of light enters a rectangular glass slab of refractive index sqrt(3) at an angle of incidence 60^(@) . It travels a distance of 5cm inside the slab and emerges out of the slab. The perpendicular distance between the incident and the emergent rays is

    A
    `5sqrt(3)cm`
    B
    `(5)/(2)cm`
    C
    `5sqrt(3//2)cm`
    D
    5cm

  • A student traces the path of a ray of light passing through a rectangular glass slab for three different values of angle of incidence (angle i) namely 30^(@), 45^(@) and 60^(@) . He extends the direction of incident ray by a dotted line and measures the perpendicular distance 'l' between the extended incident ray and the emergent ray. He will observe that :

    A
    l' keeps on increasing with increase in angle of incidence
    B
    l' keeps on decreasing with increase in angle of incidence
    C
    l' ramains the same for all three angles of incidence.
    D
    l' is the maximum for `angle i = 45^(@)` and is less then this value both for `angle i = 30^(@)` and `angle i = 60^(@)`

  • An equilateral triangular prism is made of glass (mu = 1.5) . A ray of light is incident normally on one of the faces. The angle between the incident and emergent ray is

    A
    `60^(@)`
    B
    `90^(@)`
    C
    `120^(@)`
    D
    `180^(@)`

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