Basics of UV-visible absorption spectroscopy

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Color-absorption relationship


In the visible range, the color of molecules is the first indication of their absorption wavelength: a solution is colored, which means that the molecule absorbs light corresponding to its complementary color i.e. its opposite color in the chromatic circle.

diagram of a chromatic circle: the colors of the rainbow are distributed in the circle, the angle representing the wavelength and therefore the color.
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