dark band

when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands

one of the light or dark bands produced by the interference and diffraction of light n

n the outside boundary or surface of something n a part of the city far removed from the center n one of the light or dark bands produced by the interference and diffraction of light n a social group holding marginal or extreme views n a border of hair that is cut short and hangs across the forehead n an ornamental border consisting of short lengths of hanging threads or tassels v adorn with a fringe v decorate with or as if with a surrounding fringe