Isosbestic point

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Science and technology

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What Wikipedia says

In spectroscopy, an isosbestic point is a specific wavelength, wavenumber or frequency at which the total absorbance of a sample does not change during a chemical reaction or a physical change of the sample. The word is derived from two Greek words: "iso", meaning "equal", and "sbestos", meaning "extinguishable".

Excerpt from the Wikipedia article “Isosbestic point”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: en:User:nevermore78, adapted in french by Grimlock 11:28, 4 April 2007 (UTC), CC BY-SA 3.0, via Wikimedia Commons.