Raman spectroscopy is a spectroscopic technique based on inelastic scattering of monochromatic light, usually from a laser source. It relies on inelastic scattering — meaning that the frequency of photons in monochromatic light, usually from a laser in the visible, near infrared, or near ultraviolet range, changes upon interaction with the sample. https://www.coherentmarketinsights.com/industry-reports/global-raman-spectroscopy-market