Question

What is meant by power of lens​

Answer 1

Power of lens is the degree of convergence or divergence of light rays achieved by the lens it can also be defined as the reciprocal of the focal length of lens in metrea

Answer 2

✌✌Hey, mate here is your answer

~The ability of converging or diverging of the light rays passing through the lens is known as power of the lens.
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~ The +ve sign of the power indicates that the lens is a converging lens or convex lens, whereas the negative sign of the power indicates that the lens is concave or diverging lens.
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~The S.I unit of the power is Dioptre or 1/metre.
Power = 1/focal length (in m)

.................................↪OR...........................

The power of a lens is the measure of its ability to converge or diverge a parallel beam of light on refraction through it .Negative sign for Concave lens and Positive sign for Convex lens. The S.I.unit of power is dioptre (D).
    f = 1m
​      P = 1/1m  = 1m-1 = 1dioptre (D)
      P=1/f (in  m)  =100/ f(in  cm)



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