Question

power of the convex lens of foca length 20cm is ​

Answer 1

Answer:

here focal length is 20 cm =0.2m

P=1/f (m)

=1/0.2 =5D

Answer 2

Answer:0.5D

Explanation:

This is as focal length= 20cm=0.2m

P=1/f

So p=0.5D