Question

5.The focal length of a convex lens is 25cm, then its power is *
a) 0.25D
b) 4D
c) 25D
d) 0.4D

Class 10​

Answer 1

Answer:

I think 0.25D if it is worng please don't write in your notebook ok

Answer 2

5.The focal length of a convex lens is 25cm, then its power is *

a) 0.25D

b) 4D ☃️☃️

c) 25D

d) 0.4D