(a) In what way is diffraction from each slit related to the interference pattern in a double slit experiment ?
(b) Two wavelengths of sodium light 590 nm and 596 nm are used, in turn, to study the diffraction taking place at a single slit of aperture `2 xx 10^(-4)m.` The distance between the slit and the screen is 1.5 m. Calculate the separation between the positions of the first maxima of the diffraction pattern obtained in the two cases.