Ultraviolet Spectroscopy is an analytical technique used to measure the absorption of ultraviolet light by a sample. When a sample absorbs UV light, it can cause electrons to move to higher energy levels. This absorption can provide valuable information about the molecular structure and concentration of the sample. The technique is commonly used in various fields, including chemistry, biology, and environmental science. By analyzing the absorption spectrum, scientists can identify specific compounds and monitor chemical reactions. Ultraviolet Spectroscopy is essential for quality control in pharmaceuticals and for studying biological molecules like proteins and nucleic acids.