Wien's Displacement Law (λm × T = b = 2.9 × 10⁻³ m·K)
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λm × T = b = 2.9 × 10⁻³ m·K
What each symbol means
| Symbol | What it stands for |
|---|---|
| T | Absolute temperature of the black body (K) |
| b | Wien's displacement constant = 2.9 × 10⁻³ m·K |
| λm | Wavelength at which spectral radiance is maximum (m) |
When to use this
Applies to blackbody radiation. As temperature increases, peak wavelength shifts to shorter wavelengths (blue shift). Moon surface ≈ 200 K → λm ≈ 14 μm (infrared). Sun surface ≈ 6000 K → λm ≈ 4753 Å (visible). Used to estimate surface temperatures of celestial bodies.