Question

The power of lens is 2.5
diopter. what is the focal
length and the type of lens?​

Answer 1

Answer:

Since the focal length of lens is positive so it is a convex lens.

Answer 2

Explanation:

we know that power P=2.5D

P=1/f

f= 1/2.5

=0.4m=40cm

Since the focal length of lens is positive so it is a convex lens. It is a converging lens.