A blackbody is an idealized physical object that absorbs all incoming radiation, regardless of frequency or angle. It reflects no light and emits thermal radiation based solely on its temperature. The concept is important in physics and helps in understanding how objects emit heat and light. The radiation emitted by a blackbody is described by Planck's law, which shows that the intensity of radiation varies with temperature and wavelength. This concept is fundamental in fields like thermodynamics and astrophysics, where it helps explain the behavior of stars and other celestial bodies, as well as the principles behind devices like thermal cameras.