Define power of Len\’s
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The ability of the lens to diverge or converge the rays falling on its surface is called power of lens
Power of a lens is the reciprocal of its focal length.S.I. Unit = Dioptre ot DExample: A lens of focal length 10 cm then find its power?We know, P=100/f(in cm) or P=1/f(in m)So,P=100/10P=10 D.