Past exam of the physics course of the year 1 of the natural sciences course of the University of Cambridge / 2013 / Paper 1 / Section D / D12 / c

Farther out, successive maxima and zeros occur at different angles for each wavelength. Many colour bands overlap, so the pattern becomes faint with increasingly washed-out colour contrast, rather than retaining a single sharp monochromatic fringe system. The overall single-slit intensity falls with an approximately inverse-square angular envelope.