Question

2. unit of power is:
(a) Horsepower
(b) Dioptre
(c) Volt​

Answer 1

Explanation:

The power of a lens is defined as the reciprocal of its focal length. 

Power of lens, D=f1 

Where D is the power in dioptre and f is the focal length in meters.

Also, watt and horse power are units of energy and m is the unit of length.

Hence, the correct answer is OPTION C.