Define power lens. State it's S.I unit?
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Power of lens is the ability of the lens to converge the rays of light falling on it. It can also be defined as P=1/f where f is the focal length. S.I. unit of power is D(Dioptre). It is represented by letter 'P'.
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Power of lens is the ability of the lens to converge the rays of light falling on it. It can also be defined as P=1/f where f is the focal length. ... Power of a lens is the reciprocal of its focal length.
☆ Dioptre is the S I unit of power of lens.
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