NILERED / SCIENCE PHOTO LIBRARY NILERED / SCIENCE PHOTO LIBRARY
Fluorescein dye fluorescing under UV light, while being added dropwise to a beaker of water. Fluorescein is an organic compound and dye that is used as a tracer in a wide range of medical and research applications. Here, it is fluorescing green under ultraviolet (UV) light from the lighting tube at right (blue).
Model release not required. Property release not required.