The fathers of spectroscopy, a series: Sir William Herschel

A painting of a man in red jacket holding a guitar.

Spectroscopy is the study of the absorption, reflectance, and emission of electromagnetic radiation (e.g., light) by matter, measured as a function of wavelength (or frequency). It is used as a tool for characterizing the structures of atoms and molecules by exploiting the fact that they absorb frequencies that are characteristic of their structure. Readers, while…

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