Round 2: Tossup 7

The change in wavelength caused by Compton scattering is proportional to one minus a function of this quantity. Very small values of this quantity termed “grazing” are utilized by ridged mirrors. S-polarized light is reflected, while p-polarized light is perfectly transmitted, at a value of this quantity named for David (*) Brewster. (10[3])Total internal reflection (10[1])occurs when this quantity is above a “critical” (10[1])value. (10[1]-5[1])The ratio of the index of refraction (10[1])in two media (-5[1])is related to the ratio of the sine of this quantity in those media by Snell’s law. For 10 points, name this quantity that may be expressed in radians or degrees. ■END■ (10[9]0[1])

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