Find the power of a concave lens of focal length 2 m.
Answer
Since focal length of concave lens is negative
Focal length = − 2m
We know that,
Power of a lens = 1/Focal Length
= 1/( − 2)
= − 0.5 D
Power of a concave lens is − 0.5 D
Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class