Perley Ason Ross (6 April 1883 – 13 March 1939) was a U.S. experimental physicist who worked, carefully and without seeking publicity, at some essential problems in the behaviour of X-rays.
Born in Panacea, Missouri he was awarded his PhD from Stanford University in 1911, becoming a full professor there in 1927, after a year at Cornell University.
Some of his principal studies included: Scattering of X-rays by matter; Development of the Ross differential filter for X-ray spectroscopy; X-ray polarization; Compton scattering; () and Radiative Auger effect.
His daughter, Betsy, married fellow Stanford physicist William Webster Hansen.Süsskind, C. (1981) "Hansen, William Webster" in
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