Literaturnachweis - Detailanzeige
Autor/in | Vollmer, M. |
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Titel | Hot gases: The transition from line spectra to thermal radiation. |
Quelle | In: American journal of physics, 73 (2005) 3, S. 215-223
PDF als Volltext |
Sprache | englisch |
Dokumenttyp | online; gedruckt; Zeitschriftenaufsatz |
ISSN | 0002-9505; 1943-2909 |
DOI | 10.1119/1.1819931 |
Schlagwörter | Sonne; Absorption; Linienspektrum; Physik; Plancksches Strahlungsgesetz; Quantentheorie; Thermodynamik; Emission |
Abstract | The question of how the line spectrum of atoms is transformed into the continuous spectrum of thermal radiation of a gas by repeated absorption and emission of photons is addressed.We consider a simple model of a hydrogen-like gas in thermal equilibrium where only the Lyman- atransition is allowed and calculate the spectra for increasing thickness of the gas. The transition from line spectra for optically thin samples to the spectra of thermal radiation for optically thick samples is demonstrated. We estimate the emissivities for hot gases and study the line width of spectral lines due to self-absorption processes. © 2005 American Association of Physics Teachers. |
Erfasst von | Arbeitsgruppe Didaktik der Physik, Universität Osnabrück |
Update | 2005/3 |