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1999

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Can the radiance increase in a noninverted medium?


A.N. Kosygin Moscow State Textile Academy, Malaya Kaluzhskaya str. 1, Moscow, 117918, Russian Federation

The possibility of the brightness and temperature of scattered radiation exceeding the attendant magnitudes for the incident radiation is predicted for the case of a noninverted medium, based on the analysis of radiation transfer equations. The irreversible nature of the process and impossibility of introducing ray approximation are identified as the necessary conditions.

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Fulltext is also available at DOI: 10.1070/PU1999v042n02ABEH000569
PACS: 42.25.−p
DOI: 10.1070/PU1999v042n02ABEH000569
URL: https://ufn.ru/en/articles/1999/2/e/
000079341200005
Citation: Shepelev A V "Can the radiance increase in a noninverted medium?" Phys. Usp. 42 203–204 (1999)
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Оригинал: Шепелев А В «Возможно ли увеличение яркости излучения в неинверсной среде?» УФН 169 213–215 (1999); DOI: 10.3367/UFNr.0169.199902f.0213

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