1.

In Young's double slit experiment, two slits are made 5 mm apart and the screen is palced 2m away . What is the fringe separation when light of wavelength 500 nm is used ?

Answer»

0.002 m m
0..02 m m
0 . 2 m m
2 m m

Solution :`beta = (lambda D)/(d)`
`= (500 XX 10^(-9) xx2)/(5 xx 10^(-3))`
`= 200 xx 10^(-6) = 2 xx 10^(-4) = 0.2 m m `


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