Question

08-(a) What is meant by 'power of a lens'?

(b)State and define the Slunit of powerofa lens​

Answer 1

Answer:

a)The power of a lens is defined as the reciprocal of the focal length. ... 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

Explanation:

b)The power of a lens is defined as the reciprocal of its focal length. It is represented by P. The SI unit of power is dioptre. The power of a convex lens is positive, the power of a concave lens is negative as a concave lens has a negative focal length.

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