Question

the focal length of the lens of a myopic person is 40cm.what is the power of the lens?​

Answer 1

The nature and power of lens required to correct the defect is -2.5D . Explanation: As given in the question we know that the “v” in this case would be - 40 cm while the “u” that we are talking about would be infinity now we have to put these values in the lens formula and have to find focal length.

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