Instruments and methods used in radiometry - II

Book details

Title
Instruments and methods used in radiometry - II
Publication year listed
1913
Format
Public domain eBook
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Instruments and methods used in radiometry - II

Year: 1913

The author presents a lengthy and exhaustive summary of the comparative advantages of four types of instruments : the radio-micrometer, the linear thermopile, the Nichols radiometer, and the bolometer with auxiliary galvanometer. He describes in detail the possible methods of improving the sensitiveness of the radio-micrometer, by reducing the weight of moving parts, changing the period, and placing it in a vacuum. The Rubens thermopile is found to be only about half as sensitive as a bolometer; but it can be improved by using thinner wires in a vacuum. Thermopiles are not so well adapted as bolometers for instantaneous registration of radiant energy, but their greater steadiness is%

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