Learn about Spectroscopy

Spectroscopy is the study of how a substance absorbs, transmits, or reflects radiation. This radiation can be everyday light, produced, for example, by the Sun, which can be split into a rainbow of colors from violet (which has a shorter wavelength) to red (which has a longer wavelength).

Or it can be infrared light, which has a longer wavelength than red light, and can be felt as heat.

Other types of radiation that can produce spectra are gamma-rays, which have wavelengths only a few thousandths that of visible light.

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