The Physics Factbook™
Edited by Glenn Elert -- Written by his students
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|Bibliographic Entry||Result |
|Faughn, Jerry S., Serway, Raymond A. College Physics: Fifth Edition. Philadelphia: Saunders, 1999.||"Wien's displacement law: |
λmaxT = 0.2898 × 10-2 m.k"
|"Red Heat." Dictionary of Science and Technology. New York: Larousse, 1995.||"As judged visually, a temperature between 500 °C and 1000 °C."||500–1000 °C|
|Hodyman, Charles D., Lange, Norbert A. Handbook of Chemistry and Physics. Cleveland, OH: Chemical Rubber Co., 1924.|| |
|Process Associates of America. Metal Temperature by Color.|| |
An object, at a certain temperature can emit radiation. This type of radiation is known as thermal radiation. The color of the radiation is dependent on the temperature and (according to Serway and Faughn) the properties of the object. As the temperature increases, the object begins to emit light.
The thermal radiations comes from accelerated charged particles near the surface of the object. The charged particles would emit radiation. This is the classical theory of thermal radiation.
A black body is an ideal system that absorbs all of the incident radiation on it. As the amount of energy it emits increases, so does the black body's temperature. As the temperature is increasing, the acme of the distribution move towards short wavelength. This obeys Wien's displacement law.
λmaxT = 0.2898 × 10-2mK
Where λmax is the wavelength at which the curve peaks and T is the temperature at which the object would emit radiation.
Stephanie Lum -- 2000
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