Interference  pattern  is obtained  with a  source of  red  light  of   wavelength   6400 Å. The
Channel: Doubtnut
Date: 17/05/2020

Interference  pattern  is obtained  with a  source of  red  light  of   wavelength   6400 Å. The  source is then  replaced  by  another source  of  wavelength  4000 Å.  It  is   found  that  nth  bright  fringe  of  first  source  coincides  with  `  ( n +  3 ) ^( th ) `  bright finge  of second  source. The  order  of finge  is equal  to