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Joseph Stefan, Slovene Physicist

Joseph Stefan (March 24, 1835 - January 7, 1893) was a Carinthian Slovene physicist, mathematician, and poet of Austrian citizenship. He graduated in mathematics and physics at the University of Vienna in 1857. During his student years, he also wrote and published a number of poems in Slovene. He published nearly 80 scientific articles and he is best known for originating a physical power law in 1879 stating that the total radiation from a black body is proportional to the fourth power of its thermodynamic temperature. With his law he determined the temperature of the Sun's surface and he calculated a value of 5430 °C. In 1884 the law was extended to apply to grey-body emissions by Stefan's student Ludwig Boltzmann and hence is known as the Stefan-Boltzmann law. He also provided the first measurements of the thermal conductivity of gases, treated evaporation, studied diffusion, and heat conduction in fluids. Very important are also his electromagnetic equations, defined in vector notation, and works in the kinetic theory of heat. In mathematics the Stefan problems or Stefan's tasks with movable boundary are well known. He died in 1893 at the age of 57.
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Title:
Joseph Stefan, Slovene Physicist
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Joseph Stefan (March 24, 1835 - January 7, 1893) was a Carinthian Slovene physicist, mathematician, and poet of Austrian citizenship. He graduated in mathematics and physics at the University of Vienna in 1857. During his student years, he also wrote and published a number of poems in Slovene. He published nearly 80 scientific articles and he is best known for originating a physical power law in 1879 stating that the total radiation from a black body is proportional to the fourth power of its thermodynamic temperature. With his law he determined the temperature of the Sun's surface and he calculated a value of 5430 °C. In 1884 the law was extended to apply to grey-body emissions by Stefan's student Ludwig Boltzmann and hence is known as the Stefan-Boltzmann law. He also provided the first measurements of the thermal conductivity of gases, treated evaporation, studied diffusion, and heat conduction in fluids. Very important are also his electromagnetic equations, defined in vector notation, and works in the kinetic theory of heat. In mathematics the Stefan problems or Stefan's tasks with movable boundary are well known. He died in 1893 at the age of 57.
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Album / Science Source / Smithsonian Institution Libraries
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3300 x 5397 px | 51.0 MB
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27.9 x 45.7 cm | 11.0 x 18.0 in (300 dpi)
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