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Variation of Intensity Ratios of Optically Excited Spectrum Lines with the Intensity of the Exciting Light

Abstract

THE principle referred to by Prof. Wood in his letter to NATURE of Nov. 19, that the product of a two-stage absorption increases at first as the square of the intensity of the light, that of a three-stage absorption as the cube, and so on, is evidently capable of wide application.

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BAKER, E. Variation of Intensity Ratios of Optically Excited Spectrum Lines with the Intensity of the Exciting Light. Nature 120, 917–918 (1927). https://doi.org/10.1038/120917c0

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