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100 Years Ago, Elmer Imes’ Observations Informed a New Understanding of Molecular Physics

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EMMETT WARREN, NEWS EDITOR, [email protected]

One hundred years ago this month, physicist Elmer Imes published his dissertation, “Measurements on the Near-Infrared Absorption of Some Diatomic Gases,” in Astrophysical Journal. The paper provided the scientific world with the first accurate determination of the distances between atoms in molecules using his own customized spectrometers; expanded the range of applicability of quantum theory; and provided evidence for the existence of two isotopes of chlorine. Elmer Samuel Imes. Courtesy of Wiki Commons. Before 1919, however, Imes was already making a name for himself in the...Read full article

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