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Wien's Displacement Law
The Wien's Displacement Law state that the wavelength carrying the maximum energy is inversely proportional to the absolute temperature of a black body.
i.e λmax x T = b
Where, λmax  =  Wavelength of maximum intensity ( meters )
T  =  Temperature of the blackbody ( kelvins )
b  =  Wien's displacement constant  =  2.8977685 ± 51 × 10-3 meters·kelvins
For optical wavelengths, it is often more convenient to use the nanometer in place of the meter as the unit of measure. In this case,
b  =  Wien's displacement constant  =  2.8977685 ± 51 × 106 nm·K
The law is named after German physicist Wilhelm Wien.
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