The Raman scattering is an inelastic spectroscopy technique meaning incoming light undergoes a change in color and is scattered with a different energy. The Raman process specifically describes the interaction of incident light with molecular vibrations and rotations in a material. Light can either excite vibrations and lose energy or pick up energy from present vibrations. As the shift in energy is mostly dependent on the material composition and structure and not the wavelength of the excitation light, Raman spectroscopy measures the energy shift of the Raman scattered light relative to the incident light energy which is characteristic to the sample that is being measured.
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