Fluorescence yield

Fluorescence yield refers to the efficiency with which substances emit light when they are excited by energy, such as ultraviolet radiation or particles. When a molecule absorbs this energy, it reaches an excited state and then releases some of that energy as visible light as it returns to a lower energy state. The fluorescence yield is the ratio of emitted photons to the number of absorbed photons, indicating how effectively a substance converts absorbed energy into fluorescence. Higher yields mean brighter fluorescence, useful in applications like medical imaging, chemical detection, and material analysis.