Blackbody radiation is a type of light that comes from an object that is so hot that it glows. Imagine holding a metal ball, and you heat it up with a fire until it starts to glow. As it gets hotter and hotter, it will start to glow brighter and brighter, and eventually it will start to give off all different colors of light. This is because the metal is giving off blackbody radiation. Scientists use the study of blackbody radiation to learn more about how light and heat work.