Assertion (A) :The SI unit of power of lens is 'dioptre'. Reason (R) : The power of a concave lens i

Question

Assertion (A) :The SI unit of power of lens is 'dioptre'. Reason (R) : The power of a concave lens is positive and that of a convex lens is negative.\

Professor PC Thomas Classes · Answer

(c):The S.I. unit of power of lens is 'Dioptre'. So, assertion (A) is true.\ The power of a concave lens is negative and that of a convex lens is positive. So, reason (R) is false.\