define power of a convex lens
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when a person is suffering from nearsightedness or myopia then the person use convex lens,| concave lens make object real and erect
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Power of lens is the ability of the lens to converge the rays of light falling on it.Definition: The power of a lens is the reciprocal of its focal length in meters. It is represented by the letter P. The power P of a lens of focal length f is given by f = 1/P. The SI unit of power is dioptre .
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