State and define the S.I. unit of power of a lens. – InterviewSolution

1.

State and define the S.I. unit of power of a lens.

Answer»

The S.I unit of power of lens is dioptre denoted by D.

1 D = \(\frac1{1\,m}=1\,m^{-1}\)

Thus 1 Dioptre is the power of the lens having focal length of 1m.

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