Raman spectroscopy is a non-destructive analytical technique used to study the vibrational, rotational, and other low-frequency modes in a system. It is based on the inelastic scattering of monochromatic light, usually from a laser, by molecular vibrations. When light interacts with molecular bonds, most of it is elastically scattered (Rayleigh scattering), but a small fraction of the light is scattered at different energies, corresponding to the vibrational energy levels of the molecules.
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