A beam of light consisting of two wavelengths, 6500A˚ and 5200A˚, is used to obtain interference fringes in a Young's double slit experiment. The distance between the slits is 2 mm and the distance between the plane of the slits and the screen is 120 cm.
(i) Find the distance of the third bright fringe on the screen from the central maximum for wavelength 6500A˚ .
(ii) What is the least distance from the central maximum where the bright fringes due to both the wavelengths coincide?