出典:Wikipedia
出典:『Wikipedia』 (2011/07/26 12:38 UTC 版)
A bolometer is a device for measuring the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent electrical resistance. It was invented in 1878 by the American astronomer Samuel Pierpont Langley. The name comes from the Greek word bole, for something thrown, as with a ray of light.
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a geometer
ガス・メートル
tuataras
a steam-gauge