An infrared spectrometer is an analytical instrument used to identify and quantify materials based on their interaction with infrared light. It works by passing infrared radiation through a sample, which absorbs specific wavelengths corresponding to the molecular vibrations of the sample's chemical bonds. The resulting spectrum provides a unique fingerprint of the material, allowing scientists to determine its composition. These devices are widely used in various fields, including chemistry, biochemistry, and environmental science. They help in analyzing substances such as gases, liquids, and solids, making them essential tools for research, quality control, and environmental monitoring.