Free Black Body Peak Calculator
Calculate the peak emission wavelength of a black body using Wien's displacement law: lambda_max = b / T.
K
Peak Wavelength
0.00000050 m
Peak Wavelength (nm)501.5 nm
Peak Wavelength vs Temperature
Wien's Displacement Law
Wien's law states that the peak emission wavelength of a black body is inversely proportional to its temperature.
Formula
lambda_max = b / T
where b = 2.8978 x 10^-3 m·K is Wien's displacement constant. Hotter objects peak at shorter wavelengths (bluer light).
Example Calculation
The Sun's surface temperature (~5778 K).
- 01lambda_max = b / T
- 02lambda_max = 2.8978e-3 / 5778
- 03lambda_max = 5.015e-7 m
- 04lambda_max = 501.5 nm (green-yellow visible light)
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