Thermal radiation is the phenomenon that an object radiates electromagnetic waves due to its temperature. It is a form of heat transfer in which an object transmits heat outward in the form of electromagnetic radiation. It does not depend on any external conditions. It is one of the three main modes of conduction of heat. Any object whose temperature is higher than absolute zero produces heat radiation. The higher the temperature, the greater the total energy emitted, and the more short-wave components there are.