Question

Focal length of a lens is +0.2 m, its power will be :
solution send please ​

Answer 1

Answer:

Explanation:

power= 1/f

=1/0.2

=5 diopters

Answer 2

Answer:

see for power of lens you can use p=1/f

Explanation:

So in this case it will be 1/0.2=5 D

Si unit of power of lens is Dioptre (D)