Question

A lens has a power of -2.5D the focal length and nature of lens is​

Answer 1

Answer:

Hope it helps you

Explanation:

(As D is negetive, the nature of the lens is concave.) Answer: Power of a lens is -2D, negative sign indicates it is a Concave lens

Answer 2

Answer:

power of lens is -2D , negative sign indicates it is a concave lens.