Physics, asked by chiragdt123, 11 months ago

What is meant by power of lens? Write its SI unit.A student uses a lens of focal length 40 cm and another of 20cm.Write its nature and power of each lens​

Answers

Answered by Aaradhya9061
8

Answer:

Power of lens is defined as the reciprocal of the focal length of the lens expressed in meter. SI unit of power is Dioptre denoted by D .Focal length

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