1.

Assuming human pupil to have a radius of 0.25 cm and a comfortable viewing distance of 25 cm, the minimum separation between two objects that human eye can resolve at 500 nm wavelenght is :

Answer»

`1mu m`
`30 mu m`
`100 mu m`
`300 mu m`.

SOLUTION :(b) Resolving angle of human eye
`THETA = 1.22 (lambda)/(D)`
`therefore ((y)/(25 xx 10^(-2)))`
` = (1.22 xx 500 xx 10^(-9))/(0.25 xx 2 xx 10^(-2))`
`rArr y = 30 mu m.`


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