If R is the radius of curvature of a spherical mirror and f is its focal length, then : (a) R = f (b) R=2f (c) R= $\frac{f}{2}$ (d) R=3f

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Solution

The relation between radius and focal length is that the radius of curvature is twice the focal length, i.e., R = 2f. Hence, the correct choice is (b).

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If R is the radius of curvature of a spherical mirror and f is its focal length, then : (a) R = f (b) R=2f (c) R=f2 (d) R=3f

The relation between radius and focal length is that the radius of curvature is twice the focal length, i.e., R = 2f. Hence, the correct choice is (b).

If R is the radius of curvature of a spherical mirror and f is its focal length, then : (a) R = f (b) R=2f (c) R= $\frac{f}{2}$ (d) R=3f