Question

(E) None of these
If focal length of a convex lens is 50 cm, what will the power of the
the lens.
(B) 4 diopter
(A) 2 diopter
(D) 8 diopter
(C) 6 diopter
(E) None of these
*******
also give me the formula to find it​

Answer 1

Answer:

power = 100/focal length in cm

= 100/50= 2diopter

Answer 2

Answer:

Please look at the image for your answer. Hope it helps.