Question

name the type of lence if its power is
-2.0D find the focal length of this lence​

Answer 1

since the power is negative

It is a concave lens.

also, focal length=1/power of lens[in SI units]

thus f=-0.5m

or f=-50cm

Answer 2

Answer: since power negative it is a concave lens..

Explanation: focal length =1/power so f=0.5m=50cm

atb