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Distance between two points on paper is ...

Distance between two points on paper is They are observed such that view line observer is perpendicular to them. Diameter lens of an eye of an observer is 2 mm. Fo which minimum value of d both points will h observed ?

A

`1.25 cm`

B

`12.5 cm`

C

`1.25 cm`

D

`2.5 mm`

Text Solution

Verified by Experts

The correct Answer is:
B
Resolution of eye `theta=(lambda)/(d)`
where d = diameter of lens of eye
If distance between two points is Y and distance from eye is D. then `theta=(y)/(D)`
`(y)/(D)=(lambda)/(d) rArr Y=(lambdaD)/(y) " "...(1)`
`Y=(5xx10^(-7)xx50)/(2xx10^(-3))=12.5xx10^(-3)m=12.5 cm`
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