Incandescence is the emission of light (visible electromagnetic radiation) from a hot body as a result of its temperature. The term derives from the Latin verb incandescere, to glow white.

Incandescence is a special case of thermal radiation. Incandescence usually refers specifically to visible light, while thermal radiation refers also to infrared or any other electromagnetic radiation.

For a detailed discussion of the intensity and spectrum (color) of incandescence, see the article: thermal radiation.