Fluorescent detection is a technique used in various scientific fields, including biology, chemistry, and materials science, to detect and measure the presence of specific molecules or compounds. This technique involves labeling a target molecule with a fluorescent dye or probe, which emits light when exposed to a specific wavelength of light. The emitted light is then detected and analyzed to provide information about the concentration, location, or interactions of the target molecule. Fluorescent detection is widely used in research, diagnostics, and drug discovery, as it offers high sensitivity, specificity, and versatility for detecting a wide range of molecules.