Question

33. Define power of a lens.
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Answer 1

The power of a lens is defined as the reciprocal of its focal length. It is denoted using the letter P. where f is the focal length of the lens. Since, power is positive, the lens is a converging lens or convex lens.

Answer 2

Answer:

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:

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