MacMunn, Charles Alexander · London, Churchill · leaf 41
respond (by moving the telescope along thegraduated circle) to the first visible Fraunhofer line,note the reading, then move the telescope until theintersection of the X is over another line, and take thereading as before, and so on for the other lines. From 20 PHOTOGRAPHED SCALE. these several… … the readings are given in angular measurements, butits disadvantage is the time spent in taking themeasurements. (2) By means of the photographed millimetre scale. Some one-prism spectroscopes are provided with athird tube carrying a photographed scale on glass; theimage of which, by means of a…
Spectrum analysis · Diagnosis, Spectroscopic
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