A man can see only between 75cm and 200cm. The power of lens to correct the near point will be
A
+8/3D
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B
+3D
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C
−3D
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D
−8/3D
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Solution
The correct option is A+8/3D For improving near point, convex lens is required and for this convex lens u=−25cm,v=−75cm ∴1f=1−75−1−25⇒f=752cm So power P=100f=10075/2=+83D