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Blacksmiths work iron when it is hot enough to emit plainly visible thermal radiation. The color of a star is determined by its temperature, according to Wien's law. In the constellation of Orion, one can compare Betelgeuse (T ≈ 3800 K, upper left), Rigel (T = 12100 K, bottom right), Bellatrix (T = 22000 K, upper right), and Mintaka (T = 31800 K, rightmost of the 3 "belt stars" in the middle).
Comparison of Wien’s curve and the Planck curve. Wien's approximation (also sometimes called Wien's law or the Wien distribution law) is a law of physics used to describe the spectrum of thermal radiation (frequently called the blackbody function). This law was first derived by Wilhelm Wien in 1896.
Wien's law or Wien law may refer to: . Wien approximation, an equation used to describe the short-wavelength (high frequency) spectrum of thermal radiation; Wien's displacement law, an equation that describes the relationship between the temperature of an object and the peak wavelength or frequency of the emitted light
Wilhelm Carl Werner Otto Fritz Franz Wien (German: [ˈvɪlhɛlm ˈviːn] ⓘ; 13 January 1864 – 30 August 1928) was a German physicist who, in 1893, used theories about heat and electromagnetism to deduce Wien's displacement law, which calculates the emission of a blackbody at any temperature from the emission at any one reference temperature.
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Vienna (/ v i ˈ ɛ n ə / ⓘ vee-EN-ə; [8] [9] German: Wien ⓘ; Austro-Bavarian: Wean) is the capital, most populous city, and one of nine federal states of Austria.It is Austria's primate city, with just over two million inhabitants.
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'38 – Vienna Before the Fall (German: 38 – Auch das war Wien, lit. '38 - That too was Vienna') is a 1987 Austrian-West German co-produced drama film directed by Wolfgang Glück. It was nominated for the Academy Award for Best Foreign Language Film at the 59th Academy Awards. [1] It is set in Vienna in 1937–1938 at the time of the Anschluss.