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The unit of power of the lens is

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Meter

Centimeter

Diopter

$m^{- 1}$

answer is C.

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Detailed Solution

The ability of a lens to cause the light rays falling on it to converge or diverge is what gives it power.
The reciprocal of the focal length is used to calculate a lens's power.
The lens's power is measured in diopters.

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