slits are `0.3` mm apart . Interference fringes are observed on a screen `1.3` mm apart .
Channel: Doubtnut
Date: 2021-11-02

In Young's double slit experiment , red light of wavelength 620 nm is used and the two slits are `0.3` mm apart . Interference fringes are observed on a screen `1.3` mm apart . Calculate (i) the distance of slits from the screen and (ii) the fringe width if this distance is doubled .