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2
MCQ (Single Correct Answer)

A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is

A
blue
B
green
C
violet
D
red
3
MCQ (Single Correct Answer)

An object approaches a convergent lens from the left of the lens with a uniform speed $5 \mathrm{~m} / \mathrm{s}$ and stops at the focus. The image

A
moves away from the lens with an uniform speed $5 \mathrm{~m} / \mathrm{s}$
B
moves away from the lens with an uniform acceleration
C
moves away from the lens with a non-uniform acceleration
D
moves towards the lens with a non-uniform acceleration
4
MCQ (Single Correct Answer)

A passenger in an aeroplane shall

A
never see a rainbow
B
may see a primary and a secondary rainbow as concentric circles
C
may see a primary and a secondary rainbow as concentric arcs
D
shall never see a secondary rainbow
5
MCQ (Single Correct Answer)

You are given four sources of light each one providing a light of a single colour - red, blue, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is $90^{\circ}$. Which of the following statements is correct if the source of yellow light is replaced with that of other lights without changing the angle of incidence?

A
The beam of red light would undergo total internal reflection
B
The beam of red light would bend towards normal while it gets refracted through the second medium
C
The beam of blue light would undergo total internal reflection
D
The beam of green light would bend away from the normal as it gets refracted through the second medium
6
MCQ (Single Correct Answer)

The radius of curvature of the curved surface of a plano-convex lens is 20 cm . If the refractive index of the material of the lens be 1.5 , it will

A
act as a convex lens only for the objects that lie on its curved side
B
act as a concave lens for the objects that lie on its curved side
C
act as a convex lens irrespective of the side on which the object lies
D
act as a concave lens irrespective of side on which the object lies
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