Radiation

Definition

Radiation is the transfer of heat through electromagnetic waves. Unlike conduction and convection, it does not require any medium to travel through and can occur in vacuum.

Related terms

Electromagnetic Spectrum: The range of all possible frequencies/wavelengths for electromagnetic waves, including visible light, infrared radiation, ultraviolet radiation, etc.

Absorption: When an object takes in radiant energy instead of reflecting or transmitting it.

Emission: The release or giving off of radiant energy by an object or substance.