Round 8: Tossup 5

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 (10[1])in spectrometers. The first zero of the Bessel (10[1])function J-sub-one equals the constant 1.22 in Rayleigh’s criterion for resolution limited by this process. (10[2])This process’ intensity maxima occur (10[1])when sine theta is proportional (10[1])to an integer multiple of wavelength (10[1])by Bragg’s Law. Tightly spaced slits make up gratings named for this process, which light undergoes before self-interfering in the double slit experiment. For 10 points, name this process in which light bends around an object. ■END■

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