Baly, E. C. C. (Edward Charles Cyril), b. 1871 · London, Longmans, Green · leaf 141
light passes through the prism c to theplane mirror d. By this mirror it is reflected back along its path,and passing under the prism at a it reaches the eyepiece at /.As will be seen, the prism at c is provided with the samearrangement as in the last apparatus for automatic adjustmentin the… … Fig. 48. is shown in Fig. 49; the light coming through the slit at Sis totally reflected by the right-angle prism on to the concavemirror A, by which it is directed as a parallel beam on to therefracting prism. The rays traverse the prism at minimumdeviation, and are reflected by the plane…
Spectrum analysis
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