# Find the focal length of a convex mirror

Question.
Find the focal length of a convex mirror whose radius of curvature is 32 cm.

solution:

Given, radius of curvature, $\mathrm{R}=+32 \mathrm{~cm}$

Focal length, $f=(1 / 2) \times$ radius of curvature

or $\mathrm{f}=(1 / 2) \times \mathrm{R}=(1 / 2) \times(+32)=+16 \mathrm{~cm}$