Abstract
We establish that the difference of the spectral distribution of the equilibrium radiation energy in matter from the Planck formula in the high-frequency range is determined by the imaginary part of the transverse dielectric permittivity of the matter. Based on this, we show that in a rarified high-temperature fully ionized nonrelativistic plasma, the high-frequency spectral distribution of the equilibrium radiation energy differs essentially from the Planck formula because of the power-law character of the decrease in the frequency, which is due to the presence of matter.
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This research was funded by a grant from the Russian Scientific Foundation (Grant No. 14-19-01492).
Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 187, No. 1, pp. 104–113, April, 2016.
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Bobrov, V.B., Trigger, S.A. High-frequency spectral distribution of the equilibrium radiation energy in a plasma. Theor Math Phys 187, 539–547 (2016). https://doi.org/10.1134/S0040577916040085
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DOI: https://doi.org/10.1134/S0040577916040085