Fluorescent testing is a method used to detect and analyze materials by observing their fluorescence properties. When certain substances are exposed to specific wavelengths of light, they emit light at different wavelengths, allowing for the identification of various compounds. This technique is commonly used in fields like biochemistry, forensics, and materials science. In practice, fluorescent testing involves applying a fluorescent dye or marker to a sample. When illuminated with ultraviolet (UV) light, the sample will glow if it contains the target substance. This makes fluorescent testing a valuable tool for detecting contaminants, biomolecules, and other specific materials in a variety of applications.