Wien Law

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Wien Law

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One of the radiation laws which states that the wavelength of maximum radiation intensity for a black body is inversely proportional to the absolute temperature of the radiating black body: λm = b/T where λm is the wavelength of maximum intensity; b is a constant; and T is the absolute temperature. The Wien displacement constant b is equal to 0.28978 centimeter-degree. Also called Wien displacement law . </dd>
This law, established experimentally by Wien in 1896, describes the manner in which the wavelength of maximum radiation shifts toward shorter values as the temperature of a radiator rises. It is to be distinguished from Wien distribution law which describes the variation with temperature of the intensity of emission at any wavelength. Wien displacement law is used to compute the color temperature of a radiator by insertion of its wavelength of peak intensity into the above equation to compute T. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use