Blackbody Peak Wavelength Calculator — Formula
## Wien's Displacement Law
The wavelength at which a blackbody emits most intensely is inversely proportional to its temperature.
### Formula
**lambda_max = b / T**
- *b* = 2.898 x 10^-3 m K (Wien displacement constant)
- *T* = temperature in kelvin
Hotter objects peak at shorter (bluer) wavelengths; cooler objects peak at longer (redder) wavelengths.
The wavelength at which a blackbody emits most intensely is inversely proportional to its temperature.
### Formula
**lambda_max = b / T**
- *b* = 2.898 x 10^-3 m K (Wien displacement constant)
- *T* = temperature in kelvin
Hotter objects peak at shorter (bluer) wavelengths; cooler objects peak at longer (redder) wavelengths.
Esempio Risolto
The Sun's surface at 5778 K.
- lambda_max = b / T
- lambda_max = 2.898e-3 / 5778
- lambda_max = 5.015e-7 m = 501.5 nm
- This falls in the green part of the visible spectrum.