Question

The radius of curvature of concave mirror is 12cm. Then the focal length will be *
12cm
6cm
-24cm
-6cm​

Answer 1

Answer:

6cm

Explanation:

Given,

Radius of curvature ( R ) = 12 cm

To find : Focal length ( f ) = ?

The relation between radius of curvature and focal length,

R = 2f

f = R / 2

= 12 / 2

f = 6 cm

Therefore, the focal length will be 6 cm.