Question

What is paint P, F, C, 2F, R of a concave
mirror​

Answer 1

P(Pole) : Center of the reflecting surface.

f(Principle focus) : The rays of light coming parallel to the principal axis, and at the concave mirror, they meet at a common point called principal focus.

C(Center of curvature) : It is the center of the spherical mirror.

2F : The radius of curvature (R) is represented by R = 2f, that is two times the principal focus.

R(Radius of curvature) : It is the distance from the pole of mirror to the center of curvature.