Assertion (A): If the focal length of a converging mirror is 15 cm, then its radius of curvature will be 7.5 cm. Reason (R): In order to use a converging mirror of focal length 15 cm as a make-up mirror, the face should be at a distance less than 15 cm from the converging mirror.

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KollegeApply · Accepted Answer

A is false but R is true. Explanation: Assertion (A) is false because the radius of curvature (R) is twice the focal length (R = 2f), meaning a converging mirror with a 15 cm focal length has a radius of curvature of 30 cm, not 7.5 cm. Reason (R) is true because a converging (concave) mirror only forms an upright, magnified, and virtual image, which is required for a make-up mirror when the object is placed within its focal length (at a distance less than 15 cm).

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