Question

What is radius of curvature and focal length? Can you say that radius
of curvature is double than focal length? Yes or no. ​

Answer 1

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.

Yes