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physical phenomena > event > atomic process > collision > scattering > Brillouin scattering

Brillouin scattering comparison table

Subject	is a kind of	has definition
scattering	radiation direction modification	The process whereby light is absorbed and reemitted in all directions, with essentially no change in frequency. Scattering by free electrons was the dominant source of opacity in the early universe.
Brillouin scattering	scattering	Slight changes in the frequency of radiation, caused by reflection or scattering from the high-frequency sound waves that arise from thermal vibrations of atoms in the medium.

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