Studies of instruments for measuring radiant energy in absolute value: An absolute thermobile
Book details
- Title
- Studies of instruments for measuring radiant energy in absolute value: An absolute thermobile
- Publication year listed
- 1916
- Format
- Public domain eBook
- Reading access
- Free online reader; no registration required
- Source record
- View on Archive.org
About this book
Studies of instruments for measuring radiant energy in absolute value: An absolute thermobile
Year: 1916
One of the chief necessities in the measurement of radiant energy is an instrument that shall give reliable absolute measurements. The object of the paper is the examination of an instrument designed for this purpose, in order to test its reliability in general radioraetric work, /b e.g./ as a radiation pyrometer. A by-product of the investigation is the evaluation of the so-called Stefan-Boltzmann constant (sigma;) of total radiation. The radiometric "receiver" which is the subject of the present investigation consists of a very thin strip of metal (Pt, manganin, or "therlo") coated with lampblack, etc., behind which, at a distance of 2 or 3 mm.,