Abstract
IT is well known that the D line of sodium is. the first member of a series of lines, the other members being in the ultra-violet region of the spectrum. It is known also from the investigations of R. W. Wood that sodium vapour at a moderate temperature illuminated by D light gives rise to a secondary emission of D light. This secondary emission is appropriately called by him resonance radiation. It has been further investigated by Dunoyer.
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STRUTT, R. Ultra-Violet Excitation of the D Line of Sodium. Nature 95, 285–286 (1915). https://doi.org/10.1038/095285c0
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DOI: https://doi.org/10.1038/095285c0
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