Question

5. Write about power of lens and also write its SI unit​

Answer 1

Answer: SI unit of lens is 1 Diaopter(1D)

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Answer 2

Answer:

The ability of a lens to converge or diverge a beam of the light ray is known as the Power (P) of the lens. Power is equal to the reciprocal of the focal length. That is, P = b) SI unit of the power of a lens is Dioptre. 1 diopter = = 1 m-1.