Astronomy in a nutshell, the chief facts and principles explained in popular language for the general reader and for schools (1912)
Serviss, Garrett Putman, 1851-1929, Rouben Mamoulian Collection (Library of Congress) DLC · New York, London, G.P. Putnam's sons · leaf 196
art II, Sect. 4). Still,merely bending the ray out of its originalcourse would have no important resultbut for another associated phenomenon,known as dispersion. To explain dispersionwe must recall the familiar fact that whitelight consists of a number of coloured com-ponents which, when united,… … Fig. 14. Spectrum Analysis. The red is least turned by the prism from its originalcourse and the violet most. If between the prism andthe screen on which the spectrum falls there were inter-posed a gas of any kind that gas would absorb from thecoloured rays passing through it the exact waves of…
Astronomy
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