Question

if the radius of curvature of a spherical mirror is 15 cm what is its focal length

Answer 1

heya!!

here given
R= 15 cm
As we know , focal length = R/2
=15/2
=7.5 cm
With a spherical mirror this is not the focal length, as rays do not converge in one point, depending on their distance from the optical axis. But for small mirrors this will do.

hope this helps you ☺☺

Answer 2

Focal lenght is the half the radius of the mirror...
So f=15/2=7.5 cm
With the spherical mirror this is not the focal length,as rays do not converge in one point,depending on their distance from the optical axis. But for small mirrors this will do.....