Question

If the focal length of a concave mirror is 18cm, find its radius of curvature.

Answer 1

Given :

The focal length of a concave mirror is 18 cm.

To Find :

The radius of curvature of the concave mirror.

Solution :

We know,

`\text{Focal length}=\frac{\text{Radius of curvature}}{2}\\\\F=(R)/(2)\\\\R = 18* 2\ cm\\\\R = 36 \ cm`

Therefore, the radius of curvature of concave mirror is 36 cm.

Hence, this is the required solution.