Question

Find the focal length of a spherical mirror when its radius of curvature is 30cm

Answer 1

Hey mate! Here is your answer:

The focal length of a concave spherical mirror is half the radius of curvature in front of the mirror's center. So the focal length of your mirror would be -15 cm.

R = 30 cm

And , R = 2f

So , f = R/2

f = 30/2

f = 15 cm

Thank my answer if it helps you plzz! (ツ)