Physics Interview Questions and Answers Pdf - 2

Question: 6

What are regular and irregular objects?

When parallel rays of light fall on a smooth or highly polished surface, the reflected rays are parallel to each other. This is called regular reflection.

When the parallel rays of light fall on a rough surface, the reflected rays are not parallel to each other. This is called irregular reflection.

Question: 7

Define non luminous bodies?

Bodies which have no light of their own are called non luminous bodies. Example: Earth.

Question: 8

Define centre of curvature of the lens?

Centre of curvature of the lens is the centre of the sphere of which its surface forms a part.

Question: 9

Why a convex lens is called a converging lens?

A parallel beam of light after refraction through a convex lens converges. Therefore the convex lens is called converging lens.

Question: 10

Define dispersion of light?

The splitting of white light into its constituent colours is called dispersion of light.