What is the meaning of dioptre
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The SI unit of power of lens is dioptre whose focal length is one meter. Symbol - D.
1 dioptre of power of a lens is described as the unit of measurement of the optical power of a lens or curved mirror equivalent to the reciprocal of focal length (f).
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a unit of refractive powers which is equal to the reciprocal of the focal length of a given lens.
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