Find the focal length of a concave mirror whose radius of curvature is 30 cm.

Name the spherical mirror which has:

(a) Virtual principal focus.

(b) Real principal focus.

Out of convex mirror and concave mirror, whose focus is situated behind the mirror?

If the focal length of a convex mirror is 28 cm, what is its radius of curvature?

Fill in the following blanks with suitable words:

(a) Parallel rays of light are reflected by a ______ to a point called the principal focus.

(b) The focal length of a concave mirror is the distance from the principal focus to the ____.

(c) A______ converges rays of light whereas a ______ diverges rays of light.

(d) For a convex mirror, parallel rays of light appear to ___ from a point called the principal focus