Question

Which of the following statement is wrong?
(a) P = 1/f, where f is focal length.
0(b) Power is expressed in dioptre and f is in metres.
(c) Power is expressed in dioptre and does not depend on system of unit used to
measure f.
(d) P is positive for convergent lens.​

Answer 1

Answer:

Option C) is wrong.

Explanation:

options is wrong because power is a state in diameter but it also depend on the system of unit used to measure the f (metre).