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Blazing goIITian

Joined:	16 Dec 2006
Post:	1362

23 Apr 2008 17:01:21 IST

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diffraction

None

a paper with 2 marks having separation d , is held normal to the line of sight of an observer at a distance of 50cm. the diameter of eye lens of the observer is 2 mm.
which of the following is least value of d, so hat the marks can be seen as separate.
the mean wavelength of visible light may be taken as 5000 angstorm.
1    1.25m
2    12.5cm
3    1.25cm
4     2.5mm

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