This process is caused by devices partially named “echelle,” which have relatively few lines per millimeter. Either prisms or devices named for this process are used as dispersive elements in (10[1])spectrometers. The first zero of the Bessel function J-sub-one (10[1])equals the constant 1.22 in Rayleigh’s criterion for resolution limited by this process. This process’ intensity maxima occur when sine theta is proportional to an integer multiple of wavelength by Bragg’s Law. Tightly spaced slits make up gratings named for this process, (10[1])which light undergoes (10[1])before self-interfering (10[1])in the double slit experiment. For 10 points, (-5[1])name this process in which light bends (-5[2])around an object. (-5[1])■END■ (10[3]0[2])