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Unformatted text preview: Physics 241 Quiz 22b April 17, 2008 Light of wavelength in air is incident normal to a thin layer of oil film floating on water as shown. If the reflection is suppressed (dark) by interference of rays 1 and 2, what is a possible thickness d of the oil film?
phase change by 1 2 a) /(4n1) b) /4 c) /(2n1) d) /2 e) 3/4
No phase change oil (n1>1.33) water (n=1.33) 2d = mglass = m / n1 ...
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- Spring '08