20 A parallel beam of light of all wavelengths greater than

Last updated: 6/8/2023

20 A parallel beam of light of all wavelengths greater than 3000 falls on a double slit in a Young s double slit experiment It is observed that the wavelengths 3600 and 6000 are absent at a distance of 31 5 mm from the position of the centre maximum and the orders of the interference at this point for the two wavelengths differ by 7 If the distance between the slits and the screen is 1m the separation between the two slits is a 0 08 mm c 0 2 mm b 0 13 mm d 0 1 mm