Fluorescence Spectroscopy is a technique used to study the properties of fluorescent materials. It involves shining a specific wavelength of light on a sample, which excites the electrons in the molecules. When these electrons return to their original state, they emit light at a longer wavelength, which can be measured. This emitted light provides information about the sample's composition and structure. The technique is widely used in various fields, including biochemistry, environmental science, and material science. It allows researchers to detect and quantify substances at very low concentrations, making it a valuable tool for analyzing complex mixtures and studying biological processes.