State the two kinds of spherical mirrors and distinguish them with the aid of proper diagrams.

Explain the following terms:

(a) Pole

(b) Centre of curvature

(c) Radius of curvature

(d) Principal axis

Show them on separate diagrams for each of the concave and convex mirrors.

State the two laws of reflection of light.

You are given a disc divided into seven sectors with colours violet, indigo, blue, green, yellow, orange and red in them. What would be its color when it is rotated rapidly?