The center of the reflecting surface of a spherical mirror is a point called:

Correct option is B

The correct answer is (b) pole.
· The pole of a spherical mirror is the central point on the reflecting surface of the mirror.
· It is the midpoint of the mirror's surface and is usually denoted by the letter 'P.'
· The pole is significant in ray diagrams and calculations involving spherical mirrors as it serves as a reference point for measuring distances.
Information Booster:
· Principal axis: The principal axis is an imaginary line that passes through the pole and the center of curvature of the mirror.
· Center of curvature: The center of curvature is the point on the principal axis at a distance equal to the radius of curvature from the pole. It is the center of the sphere from which the spherical mirror is a segment.
· Focus: The focus is the point on the principal axis where parallel rays of light either converge (concave mirror) or appear to diverge from (convex mirror) after reflecting off the mirror. It is located halfway between the pole and the center of curvature.