Wien's Displacement Law
The physical law stating that peak emission wavelength of a blackbody spectrum is inversely proportional to its absolute temperature.
Governing formula
λ_max T = b ≈ 2.89777 × 10⁻³ m·K
SI unit
m·K
In depth
As objects heat up, their radiation spectrum shifts toward shorter, higher-energy wavelengths (red hot → yellow hot → white hot → blue hot).
Examples in the real world
A star at 6000 K peaking in visible yellow light (~500 nm), whereas human skin at 310 K radiates peak infrared light (~9.3 µm).