Question

A lens has power -4.5 D. is it convex or concave​

Answer 1

Answer:

concave lens

Explanation:

since the power is negative so it is a concave lens

hope it helps!!!

Answer 2

Answer:

concave lens

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