What do you understand by the term power of a lens ?
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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.
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Power of a lens is the ability to converge or diverge the ray of light falling on it. ... A lens of small focal length has large power of converging or diverging a parallel beam of light. Unit of power is Diopter (D) Power of lens is 1 diopter if its focal length is 1 m. Consider 2 lenses with focal length.
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