Wien approximation

The Wien approximation is the short-wavelength limit of the Planck law:

B_{λ} (T) ≃ \frac{2 h c ^{2}}{λ ^{5}} e^{- h c / (λ k_{B} T)} .

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Derivation of Wien's displacement law
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Planck's law
Wien's displacement law

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codex/wien-limit

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Wien approximation by

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The Wien approximation, often referred to in the context of blackbody radiation, is related to Wien's law, which describes the shift of the peak of the emission spectrum of a blackbody as a function of its temperature.

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Wien approximation by

Ciro Santilli  40 Updated 2025-07-16

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