Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 608
the prism P. On leaving the prism the light is decomposed, and in thisstate falls on the lens .r. I5y this lens r a real image of the spectrumis formed at the principal fo( us of .r. This image is seen by the observer 590 On Light [587- … Fig. 568 through a magnifying glass, which forms at ss a virtual image of the spectrummagnified about eight times. The telescope C serves to measure the relative distances of the linesof the spectrum. For this purpose a micrometer is placed at ;//, dividedinto 25 equal parts. A micrometer is formed…
Physics
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