Question

What is relation between focal length and radius of curvature for a mirror? Derive the relation.

Answer 1

Answer:

focal length is half of radius of curvature

Answer 2

Explanation:

After reflection, it goes along P'R, through the focus F P is the pole and F is the focus of the mirror. The distance PF is equal to the focal length f. C is the centre of curvature. The distance PC is equal to the radius of curvature R of the mirror.