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The Cotton effect is the characteristic change in optical rotatory dispersion and/or circular dichroism in the vicinity of an absorption band of a substance. In a wavelength region where the light is absorbed, the absolute magnitude of the rotation at first varies rapidly with wavelength, crosses zero at absorption maxima and then again varies rapidly with wavelength but in opposite direction. This phenomenon is known as the Cotton effect.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Cotton_effect". A list of authors is available in Wikipedia.|