Question

the focal length of a convex lens is 40 cm . in diaopter is ?????? ​

Answer 1

Explanation:

Sure I will answer it for you mate Given,

Focal length of Convex lens is 40cm

Power,= 100/f(in CM)

so,

Power = 100/40

Power = 2.5D

This is the answer friend please mark it as brain list please please follow me too

Answer 2

Answer:

ok you have written nice