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While working on black-body radiation, Wien formulated an expression that is correct in what limit?

  • Photon-gas limit

  • Speed of light limit

  • Temperature limit

  • Pressure limit

Answer

Wien's displacement law is a law in physics that states that the wavelength of maximum energy emitted by a black body is inversely proportional to the temperature of the body. It was first formulated by Wilhelm Wien in 1893. Wien's law is correct in the photon-gas limit, which is the limit where the density of photons is so high that the interactions between photons are negligible.
Wonderful Wilhelm Wien: A Journey through the Life of a Visionary Physicist

Wonderful Wilhelm Wien: A Journey through the Life of a Visionary Physicist

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