Question

a spherical mirror has a focal length -30 cm what type of mirror is this also find the radius of curvature
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Answer 1

Answer:

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

Answer 2

Explanation:

mirror is concave mirror because focal length is negative

and its radius of curvature is

f = r/2

- 30cm = r/2

- 60 cm= r