12 Physics CBSE UNIT TEST PAPER 01 pdf

A young’s double slit experiment using light of wavelength 400 nm, interference

fringes of width to 600nm, and the separation between the slits is halved. If one

wants the observed fringe width on the screen to be the same in the two cases,

find the ratio of the distance between the screen and the plane of the interfering sources in the two arrangements.