Question

(b)the radius of curvature of a spherical mirror is 20 cm. What would be its focal length?

Answer 1

the radius of curvature of spherical is always double of the focal length..

therefore the focal length = 2/20

=10

Ans. the focal length of the spherical mirror having the radius 20 cm is 10 cm

Answer 2

HEY FRIEND HERE IS UR ANSWER ,

Radius of curvature (R) = 20 cm

Radius of curvature of the spherical mirror = 2 × Focal length (f) R = 2f

f= R/2 = 20 / 2 = 10

Therefore, the focal length of the spherical mirror is 10 cm.

HOPE IT HELPS :)

MARK ME AS BRAINLIEST AND FOLLOW ME !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!