Absorption spectrum

Definition: Absorption spectrum describes the fraction of incident radiation that is absorbed by the material as a function of the wavelength, frequency, or photon energy of the incident light. When photons impinge on a medium, their transmission depends on a combination of reflectance, scattering and absorption. Absorption occurs at specific wavelengths, determined by the atomic or molecular properties (energy states) of the materials in the light path.

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References: https://doi.org/10.1017/CBO9781139029797

Related terms: Absorption, Absorption coefficient