Scattering
Introduction
When electromagnetic radiation passes through matter, most of the radiation
continues in its original direction but a small fraction is scattered in
other directions. Light that is scattered at the same wavelength as the
incoming light is called Rayleigh scattering. Light that is scattered in
transparent solids due to vibrations (phonons) is called Brillouin scattering.
Brillouin scattering is typically shifted by 0.1 to 1 cm-1 from
the incident light. Light that is scattered due to vibrations in molecules
or optical phonons in solids is called Raman scattering.
Raman scattered light is shifted by as much as 4000 cm-1 from
the incident light.
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