UV spectroscopy, or ultraviolet spectroscopy, is a technique used to analyze the absorption, transmission, and emission of ultraviolet light by molecules. This method is commonly used in chemistry and biochemistry to identify and quantify compounds, study molecular structure and interactions, and monitor chemical reactions. By measuring the absorption of UV light at different wavelengths, researchers can obtain important information about the electronic transitions and energy levels of the molecules being studied. UV spectroscopy is a powerful tool for determining the concentration of a sample, determining the purity of a compound, and studying the dynamics of chemical processes.