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- W2008575520 abstract "On the theory of electrons the colour of bodies is explained in three ways: (1) The body is homogeneous and the electrons in it execute vibrations about their mean position in the molecules. (2) The body is homogeneous and the electrons in it are free to move about from molecule to molecule as is the case with metals. (3) The body may consist of small spheres or grains of colouring matter embedded in a homogeneous transparent medium. We get an absorption spectrum with bands in it from (1) and (3), but not from (2). We can distinguish (3) from (1) by the polarised light scattered by the grains; the quantity of light scattered is, however, small in comparison with the quantity absorbed in the grains. The granular structure is also revealed by ultramicroscopic examination. This investigation is concerned only with (1). An absorption band, then, corresponds to a principle oscillation of the molecule or whatever system the absorption spectrum is characteristic of. Let the principal co-ordinates of this system be q 1 , q 2 ... q n ; Then, when a light wave is being transmitted across the medium, if the motion is not damped, the typical equation of motion assumes the form." @default.
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- W2008575520 date "1909-09-18" @default.
- W2008575520 modified "2023-10-16" @default.
- W2008575520 title "On the mechanism of the absorption spectra of solutions" @default.
- W2008575520 doi "https://doi.org/10.1098/rspa.1909.0066" @default.
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