Find the power of a concave lens of focal length 2 m.

Q. Find the power of a concave lens of focal length 2 m.

 

Answer:-

Here given :

Focal length of lens f = − 2 m
Power of concave lens P = ?
1
P =
f
1
P =
2

 

P = 0.5 dioptre

The power of concave lens is − 0.5 dioptre