The radius of curvature of a spherical mirror is 30 cm. What is the focal length of the mirror?

1 Answer
MeneerNask
Oct 21, 2016

Focal length is half the radius of the mirror.

Explanation:

So #f=30//2=15cm#

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.

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