Fourier Transform Infrared Spectroscopy (FTIR) is a powerful analytical technique used to identify and characterize chemical compounds based on their interaction with infrared light. In FTIR, a sample is exposed to a broad range of infrared wavelengths, causing its molecules to absorb specific frequencies unique to their chemical bonds. The resulting infrared spectrum is then transformed using Fourier analysis, providing a high-resolution display of absorption peaks. This technique enables the identification of functional groups, determination of molecular structures, and analysis of chemical compositions in diverse substances, including organic and inorganic compounds. FTIR is widely employed in chemistry, material science, pharmaceuticals, and environmental analysis for its sensitivity and ability to provide detailed molecular information.