Wien's Displacement Law

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Wien's displacement law

[′vēnz di′splās·mənt ‚lȯ]
(statistical mechanics)
A law for blackbody radiation which states that the wavelength at which the maximum amount of radiation occurs is a constant equal to approximately 2898 times the product of 1 micrometer and 1 kelvin. Also known as displacement law; Wien's radiation law.

Wien’s Displacement Law


a law that asserts that the length λmax of a wave that receives the most energy in an equilibrium spectrum is inversely proportional to the absolute temperature T of the radiating body: λmax T = b, where b is a constant equal to 0.2897 cnv°K. Wien’s displacement law indicates how the maximum in an energy distribution is displaced within the radiation spectrum of a blackbody in case of a change in temperature. The law was first derived by W. Wien in 1893 on the basis of thermodynamic observations.