Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 153
e the effect shown in the lower figure, — a con-tinuous spectrum crossed by blackx lines which exactly replacethe bright lines. Insert a screen between the lamp flame andthe lime, and the dark lines instantly turn bright again. Theexplanation of the Fraunhofer lines, therefore, is that they… … Fig. 53. — Reversal of the Spectrum. ever, known as Telluric lines, are due to the gases and vapors of the earths atmosphere, — to water-vapor and oxygen especially. 196. Chemical Constituents of the Sun. — Numerous lines of the solar spectrum can be identified as due to the pres- 1 Their…
Astronomy · Constellations
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