Question

what is the power of the concave lens​

Answer 1

Answer:

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Explanation:

The power of a convex lens is positive as a convex lens has a positive focal length, while the power of a concave lens is negative as concave lens has a negative focal length. The S.I. unit of power of a lens is ‘dioptre

Answer 2

Required Answer:

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