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A person can see clearly object only whe...

A person can see clearly object only when they lie between 50cm and 400cm from his eyes. In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use, will be

A

convex, +2.25 diopter

B

concave, -0.25 diopter

C

concavve, -0.2 diopter

D

convex +0.15 diopter

Text Solution

Verified by Experts

The correct Answer is:
B
`(1)/(v)-(1)/(u)=P`
`(1)/(-4m)-(1)/(oo)=P`
P=-0.25D
And lens is concave.
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