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アイザック・アシモフは、アーサー・コンプトンが1923年に光子としてのエネルギーの量子化を定義したと記している。Asimov, I. (1966). The Neutrino, Ghost Particle of the Atom. Garden City (NY): Doubleday. ISBN0-380-00483-6. LCCN66-3、Asimov, I. (1966). The Universe From Flat Earth To Quasar. New York (NY): Walker. ISBN0-8027-0316-X. LCCN66-5
Presentation speech by Svante Arrhenius for the 1921 Nobel Prize in Physics, December 10, 1922. Online text from [nobelprize.org], The Nobel Foundation 2008. Access date 2008-12-05.
Buchwald, J.Z. (1989). The Rise of the Wave Theory of Light: Optical Theory and Experiment in the Early Nineteenth Century. University of Chicago Press. ISBN0-226-07886-8. OCLC18069573