Question

The distance from the pole of the spherical mirror to its focus is called ----- of that mirror.

Answer 1

A curved mirror is a mirror with a curved reflecting surface. The surface may be either convex or concave. Most curved mirrors have surfaces that are shaped like part of a sphere.

Complete step by step solution:
The distance from the pole to the focal point is called thefocal length (f). The focal length of a spherical mirror is then approximately half its radius of curvature.

Thus the distance from the pole to the focal point is called the focal length (f)
Centre of curvature is always represented by C and is always at distance equal to $2f$ from the pole.

Thus, $radius\;\;of\;\;curvature = 2f$

Note: Always follows the sign convention while dealing with the problem of optics.