Draw suitable diagrams to illustrate how a beam of light incident parallel to the principal axis is reflected by:

(a) a concave mirror and

(b) a convex mirror.

How is the focal length of a spherical mirror related to its radius of curvature?

State the direction of incident ray which after reflection from a spherical mirror gets reflected along its own path. Give a reason.

How is a spherical mirror used to converge a beam of light at a point? Name the type of mirror used.