Tossup

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 spectrometers. The first zero of the Bessel function J-sub-one equals the constant 1.22 in Rayleigh’s criterion for (10[1])resolution (10[1])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 (-5[1])spaced slits make up gratings named for this process, which light undergoes before (-5[1])self-interfering in the double slit experiment. For 10 points, name this process in which light bends around an object. ■END■ (10[1]0[3])

ANSWER: diffraction [accept diffraction gratings; prompt on dispersion before “dispersive” by asking “what causes the dispersion?”]
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Summary

TournamentEditionTUHConv. %Neg %Average Buzz
UK (North)UK580%20%66.50
UK (South)UK8100%13%56.13
Northern CaliforniaUS4100%0%36.25
Southern CaliforniaUS7100%0%50.00
Eastern Canada (1)US560%40%65.67
Eastern Canada (2)US9100%22%64.44
FloridaUS475%0%79.33
Great LakesUS1283%17%77.80
Lower Mid-AtlanticUS956%56%79.60
Upper Mid-AtlanticUS250%50%84.00
MidwestUS9100%22%69.44
NorthUS4100%0%71.50
NortheastUS1080%40%78.38
PacificUS7100%0%71.29
SoutheastUS1369%31%57.67
Upstate NYUS5100%0%70.20