Fluorometry is a technique used to measure the intensity of fluorescent light emitted by a sample when it is excited by a specific wavelength of light. This method is commonly employed in various fields, including biology, chemistry, and environmental science, to analyze substances that fluoresce, such as fluorescent dyes or biomolecules. The process involves shining light onto a sample, which absorbs the energy and re-emits it at a longer wavelength. The emitted light is then detected and quantified, allowing researchers to determine the concentration of the fluorescent material. Fluorometers are the instruments used to perform these measurements, providing valuable data for scientific studies.