Question

A point at which ray of light appears to converge or diverge after reflection by the spherical mirror. ​

Answer 1

Answer:

Focus: It is any point, where light rays parallel to the principal axis, will converge after reflecting from the mirror. Principal axis: An imaginary line passing through the optical center and the center of curvature of the spherical mirror.

Answer 2

Answer:

Principal focus of a convex mirror: A point on principal axis from which a beam of light rays appear to diverge after being reflected from the convex mirror. Rule 1: When a ray of light which is parallel to the principal axis gets reflected, it passes through its focus