Question

The power of the lens is -5.0 D. Find out its focal length.​

Answer 1

Answer:

Power of the lens is given as   P=−5D

Focal length of the lens  f (in meter)=P (in D)1

⟹ f=−51 m=−0.2 m=−20 cm

(−ve sign represents concave lens)

plz mark me as brainliest