Sunday, February 05, 2006
black-body - definition - thermodynamics and electromagnetism
Definition: A body that completely absorbs any heat or light radiation falling upon it. The classic example of a black body is a metal box with a very small apeture in it. Any light that enters the apeture is bound to be absorbed by the walls before it has a chance to be reflected out the apeture again, making the box "black."