Question

plane mirror is a part of sphere of radius .​

Answer 1

Explanation:

A plane mirror is a spherical mirror with an infinite radius of curvature. Concave: Parallel rays close to central axis reflect through a common point F. F is called the focal point. f is the focal length (distance from center of mirror to F)...

Answer 2

Answer:

a plane mirror can be considered to be the limit of either a concave or a convex spherical curved mirror as the radius, and therefore the focal length becomes infinity.