A concave mirror has a focal length of 30.0 CM. an object is placed 15.0 CM from the mirror. what is the radius of curvature of the mirror?

60 cm

Explanation:

We are given;

Focal length of a concave mirror as 30.0 cm Object distance is 15.0 cm

We are required to determine the radius of curvature.

We need to know that the radius of a curvature is the radius of a circle from which the curved mirror is part.

We also need to know that the radius of curvature is twice the focal length of a curved mirror.

Therefore;

Radius of curvature = 2 * Focal length

Therefore;

Radius of curvature = 2 * 30 cm

= 60 cm