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A man suffering from short sight is unab...

A man suffering from short sight is unable to see objects distinctly at a distance greater than 2 m. The power of lens required to correct this deffect should be

A

0.50 D

B

`-2D`

C

`-0.50D`

D

`+2D`

Text Solution

Verified by Experts

The correct Answer is:
C
To see the distant objects clearly, he should use a concave lens of focal length 2m or f = -2 m.
`therefore P=(1)/(f)=(1)/((-2))= -0.5 D`
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