Question

In a YDSE green light of wavelength 500 nm is used. Where will be the second bright fringe be formed for a set up in which separation between slits is 4 mm and the screen is placed 1 m from the slits?

Answer 1

Position of second bright fringe, `y_(2)=(2lambda D)/d`
`=(2xx500xx10^(-9)xx1)/(4xx10^(-3))=0.25` mm