The near point of a person is at 40 cm from the eye.Find the power of the lens he should ....

Asked by  | 22nd Jul, 2008, 03:24: PM

Expert Answer:

Using the equation :

(1/v)-(1/u)=1/f

we have:

(100/25)-(100/40)=1/f

So power=1/f=  1.5 D

Answered by  | 22nd Jul, 2008, 09:31: PM

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