Two slits are 1 m mapart and the same slits are 1 m from a screen.Find out fringe separation,when light of wavelength 500 nm is used.

Explanation

`d = 1mm = 10^(-3) m`
D = 1m
`beta` = ?
`lambda = 500 nm = 500 xx 10^(-9) m`
`= 5 xx 10^(-7) m`
`beta = (lambdaD)/d = (5 xx 10^(-7) xx 1)/10^(-3) = 5 xx 10^(-4) m = 0.5`mm