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write the formula of lens in terms of power |
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Answer» The degree of divergence or convergence of ray of light by a lens is expressed in terms of the power of lens. Degree of convergence and divergence depends upon the focal length of a lens. The power of a lens is denoted by ‘P’. The power of a lens is reciprocal of the focal length.Power P=1/Focal length fOr, P=1/f Power= 1/f1/f=1/v-1/uPower= 1/v-1/u |
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