What is the relation between radius of curvature and focal length of a concave mirror ?

Radius of curvature =………x focal length.

What is a concave mirror ?

What is called a focal point of a concave mirror ?

What is the relation between focal length and radius of curvature ?

What is the relation between Power and Focal length of the lens ?

The properties of image when a real object is kept in between focus and centre of curvature of a concave mirror.

How do you identify the focal point in focal length of concave mirror?

Define focal length of a concave mirror. Prove that the radius of curvature of a concave mirror is double its focal length.