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A man can see only between 75 cm and 200 cm. The power of lens to correct the near point will be

a
+ 8/3 D
b
+3 D
c
-3 D
d
- 8/3 D

detailed solution

Correct option is A

For improving near point, convex lens is required and for this convex lensu = -25 cm, v = - 75 cm∴1f=1−75−1−25⇒f=752cmSo  power  P=100f=10075/2=+83D

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