Energy stored in electromagnetic waves or radiation. Energy is released when the waves are absorbed by a surface. Any object with a temperature above absolute zero (-273° Celsius) emits this type of energy. The intensity of energy released is a function of the temperature of the radiating surface. The higher the temperature the greater the quantity of energy released.
The energy stored in an electromagnetic field.
Type of energy distinct from chemical energy, kinetic energy, etc. Visible light and radio waves are both forms of electromagnetic energy. See also "Radiation."