Refraction

How does light behave as it enters these mediums?

• continue its path as straight line.
• bends toward the normal
• bends away from the normal
• reflects

Which color of light is most refracted during dispersion by a prism?

• red
• yellow
• green
• violet

When a beam of white light falls on a glass prism, the colour of light which will deviate least is:

• Violet

• Red

• Green

• Blue

In which of the following cases will no dispersion take place when sunlight passes through it?

• a

• b

• c

• d

How will you use two identical prisms so

that a narrow beam of white light incident

on one prism emerges out of the second

prism as white light?

• (a) One placed inverted with respect to the other.

• (b) One placed on top of the other.

• (c) Just put them side by side.

• (d) Parallel to each other.

Study the following diagram. In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively have been represented by

• a) y, p, z

• b) x, q, z

• c) p, y, z

• d) p, z, y

In which of the following diagrams is the

path of a ray of light passing through a

glass prism is shown correctly?

• (I)

• (II)

• (III)

• (IV)

In the given figure, a light ray AB is incident normally on one face PQ of an equilateral glass prism. Find out the angles at faces PQ and PR.

Which coloured light is most suitable to be used for headlights during a foggy weather?

• Red

• Green

• Yellow

• White

The velocity of light in vacuum is _______ m/s

• 3x10⁸
• 3x10¹²
• 3x10⁶
• 3x10¹⁰