Question

In spherical mirrors, radius of curvature = 2 × _______.

Answer 1

1. The focus is the mid-point of the straight line joining the pole to the centre of curvature. It is denoted by F.
2. The radius of the sphere of which the spherical mirror is a part is called the radius of curvature.
3. Therefore, the radius of curvature is twice the focal length.

Hence, In spherical mirrors, the radius of curvature = 2 × f.