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Radiation from platinum at high temperatures

by: Burgess, G.K.

Publication date: 1905-11

Topics: rays and radiation, temperature, thermometry, pyrometry and calorimetry, Heat flow, thermal and thermodynamic processes

Publisher: National Bureau of Standards

Collection: NBSBulletin; NISTresearchlibrary; fedlink; americana

Contributor: NIST Research Library

Language: English

Volume: Bulletin of the Bureau of Standards, Vol. 1, 443-447 (1905) Scientific Paper 24 (S24)

If thetas /sub 1/ is the reciprocal of the temperature of a black body, and thetas /sub 2/ that of any other substance at the same photometric brightness, it is shown that thetas /sub 1/ = /b a/ thetas /sub 2/ beta , where /b a/ and beta are constants whose physical interpretation is here given. As the equation is linear, a knowledge of the black-body temperature and true temperature at two points only is sufficient to define completely the departure of the radiation of a given substance from that of a black body throughout the entire temperature scale, provided no chemical change takes place.