# Wien's law

From AMS Glossary

## Wien's law

(

*Also called*Wien's displacement law.) A radiation law that is used to relate the wavelength of maximum emission from a blackbody inversely to its absolute temperature.It is expressed as: where λ

_{m}is the wavelength of maximum emittance in microns, and*T*is the blackbody temperature in Kelvin.*See also*color temperature.