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Stefan, Josef |
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Stefan, Josef (yō`zĕf shtĕf`än), 1835–93, Austrian physicist. At the Univ. of Vienna he became a professor of physics and later director of the Physical Institute. From his observations on the relationship between radiant heat emitted by a body and its temperature, Stefan concluded that the total radiation of a body was proportional to the fourth power of its absolute temperature. One of his students, Austrian physicist Ludwig Boltzmann, later derived the same relationship from a thermodynamic viewpoint. This principle, called the Stefan-Boltzmann law, played an important part in considerations leading to Max Planck's quantum theory. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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