Question

The focal length of a concave mirror is 5 cm. Its radius of curvature is ____​

Answer 1

Radius of curvature(R) = ?

Focal length(f) = 5cm

R=2f

$= 2 \times 5$

$= 10cm$

Radius of curvature is 10cm.

Answer 2

radius of curvature =2 × focal length

given focal length = 5 cm

radius of curvature = 2 × 5 = 10