Question

Prove that the radius of curvature will be twice focal length​

Answer 1

$\mathfrak{\huge{\orange{\underline{\underline{ANSWER :}}}}}$

For spherical mirrors of small apertures, the radius of curvature is found to be equal to twice the focal length. We put this as R=2f. This implies that the principal focus of a spherical mirror lies midway between the pole and centre of curvature.

Hope It Will Help.❤