Question

power of concave lens it .​

Answer 1

Answer:

power is measured in dioptre 1/p=1d

Answer 2

Explanation:

The power of a lens is defined as the reciprocal of the focal length. Lens power is measured in dioptres (D). Converging (convex ) lenses have positive focal lengths, so they also have positive power values. Diverging (concave ) lenses have negative focal lengths, so they also have negative power values.