A double slit of separation 1 5 mm is illuminated by white

Last updated: 5/31/2023

A double slit of separation 1 5 mm is illuminated by white light between 4000 8000 On a screen 120 cm away coloured interference pattern is formed If a pinhole is made on this screen at a distance of 3 0 mm from the central white fringe some wavelengths will be absent in the transmitted light Find the second longest wavelength in which will absent in the transmitted light