A ray of light parallel to the principal axis of spherical mirror

This question is incomplete but the completed question is below

A ray of light parallel to the principal axis of a spherical mirror passes through its after reflection.

(a) focus (b) pole (c) centre of curvature (d) imaginary centre of curvature

The correct option is (a)

Explanation:

After reflection, a ray of light will usually appear to diverge after they hit a spherical mirror, extending behind the mirror to meet at a point (called the focus or focal point) between the pole and the centre of curvature of this mirror.  Hence, option a is the correct option.

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