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A person can not see the objects clearly...

A person can not see the objects clearly placed at a distance more than 40 cm . He is advised to use a lens of power

A

`-2.5 D`

B

`+ 2.5 D`

C

` -6.25 D`

D

`+ 1.5 D`

Text Solution

Verified by Experts

The correct Answer is:
A
Since `u = prop ` and v =-40 cm using the lens formula ,` f= -40 cm `
Also ` P= (100) /(-40) D= -2.5 D `
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