Question

If f is focal length and R is the radius of curvature, then f = R/2 is valid for * a) Only Convex mirror b) Only Concave mirror c) All types of mirrors d) Only Plane mirrors​

Answer 1

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Explanation:

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Answer 2

Answer:

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 i.e. f=R2. Let us derive this relation. Consider a concave mirror such that its radius of curvature is very much larger than the diameter of its aperture.