phosphor
/ˈfɑsfər/
noun
- A substance that gives off light after being exposed to radiation, such as ultraviolet light or an electron beam, used in things like screens and glow-in-the-dark materials.
- Glow-in-the-dark stars on a ceiling are coated with a phosphor that absorbs light and slowly releases it.
- The old computer monitor used a phosphor that glowed green when hit by electrons.
- Scientists developed a new phosphor for LED bulbs to make the light look more natural.