Question

the focal length of lens is 50centimets. its power is​

Answer 1

Answer: 2D

Explanation:

Power of a lens is always reciprocal to the focal length. So, aconvex lens with 50cm focal length has a power of (1/0.5) Dioptre(D) or 2D. Since, a convex lens is a converging lens, thepower of the convex lens is +2D

Answer 2

Answer:

ANSWER

Focal length of a lens is 50 cm.

So power is p=f1=0.51 where  f is in metre.

 Its power would be 2 dioptres.

Explanation:

I hope it is helpful

please mark me as BRAINLIST