What will be the focal length of convex mirror whose radius of curvat…

For spherical mirrors of small apertures, the radius of curvature is found to be equal to twice the focal length.

We put this as R = 2f of f = \(\frac{R}{2}\)

This implies that the principal focus of a spherical mirror lies midway between the pole and centre of curvature.

For convex mirror,

R = +30 cm

f = \(\frac{R}{2}\) = \(\frac{30}{2}\) = 15 cm