write the correct formula of power of lens one word
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The power of a lens is specified as P = 1F, where f is the focal length. The S.I. unit of power of a lens is m−1. This is also known as diopter.
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The power of a lens is specified as P = 1F, where f is the focal length. The S.I. unit of power of a lens is m−1. This is also known as diopter.
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