Raman spectroscopy is a technique used in analytical chemistry and materials science to study the vibrational modes of molecules. It involves shining a laser on a sample and measuring the scattered light to determine the frequencies of vibrations within the molecules. This can provide information about the chemical composition, structure, and bonding of the material being analyzed. Raman spectroscopy is widely used in various fields such as pharmaceuticals, forensics, and environmental science for its ability to provide detailed molecular information with high sensitivity and specificity.