Black-body Radiator

A black-body radiator is an idealized object that absorbs all incident radiation, regardless of frequency or angle, and re-emits it perfectly as thermal radiation. In simpler terms, it is a perfect emitter and absorber of heat. The concept helps scientists understand how objects emit energy in the form of light and heat. Real objects, like stars or heated metals, approximate black-body behavior. The spectrum of light emitted depends on the object's temperature, which is described by Planck's law, leading to the understanding of phenomena like color changes in heated materials.