Question

Hay guys follow me and I will follow you and I shall make you brilliant good afternoon you please help me Question :- Find the power of a concave lens of focal length - 15 .

Answer 1

power

if the focal length =15cm=0.15m

1/f=1/0.15=100/15=20/3=6.66D

if the focal length =15m

1/f=1/15=0.06D