1.

Two point white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately, what is the maximum distance at which these dots can be resolved by the eye ? (Take wavelenght of light = 500 nm) :

Answer»

5 m
1 m
6 m
3 m

Solution :(a) Resolution limit is given by
`(y)/(D) = 1.22 (lambda)/(d)`
`rArr "" D = (y.d)/(1.22 lambda) = (30)/(6.1) APPROX 5 m`
`THEREFORE "" D_(MAX). = 5 m`


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