Question

.lf the radius of curvature of a lens is 30cm
then what is focal length?
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Answer 1

Answer:

radius of curvature = 2 focal length

focal length = radius of curvature / 2

focal length = 30/2 = 15 cm.

Answer 2

Answer:

15cm

Explanation:

The relation between focal length (f) and radius of curvature (R) of a spherical mirror is that the focal length is equal to half of the radius of curvature.