Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 432
r to a strong light. Besides the absorption by liquids, the vapours of the CHAP, xxviir.] THE CHEMISTRY OF THE STARS. 409 metals also absorb selectively, and if a tube containinga piece of sodium and filled with hydrogen (so that themetal will not get oxidized) is placed in the path of therays, and… … Fig. lS-3.—Spectmscopu aiiaiiyed lor .showing Absorption. finally the whole light of that particular colour is ali-sorbed, and we have a dark line in its place. To sumup then :— We get from solids, when heated, general radia-tion, and when they act as absorbers, we get generalabsorption ; from…
Astronomy · Telescopes
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