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A man can see only between 75 cm and 200...

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`

Text Solution

Verified by Experts

The correct Answer is:
A
For improving near point , conve lens is required and for this convex lens
`therefore(1)/(f)=(1)/(-75)-(1)/(-25)rArrf=(75)/(2)cm`
So power `P=(100)/(f)=(100)/(75//2)=+(8)/(3)D`
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