Wien's Law Calculator

Find the peak emission wavelength of a blackbody.

Peak wavelength (nm) 501.52

Formula: λ_max = b ÷ T

Step-by-step with your numbers:

1. Values used:

2. Temperature = 5,778 K

4. Peak wavelength = 501.52nm

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Wien's law gives the wavelength at which a hot object radiates most strongly.

The math behind it

λ_max = b ÷ T, with Wien's constant b ≈ 2.898 × 10⁻³ m·K. Hotter objects peak at shorter (bluer) wavelengths.

The Sun (5778 K) → peak near 502 nm (green).

Why do hot metals glow blue-white?

Higher temperature shifts the peak toward shorter wavelengths.