Bürgel, Bruno Hans, 1875-, Bloch, Stella · London, New York, [etc.] Cassell and company, ltd. · leaf 111
Fig. 69.—Glass Prism. … Fig. 70.—How a Spectrum is formed. The ray of light coming in from the right through a chink in the shutter strikes theprism, which refracts and separates it, thereby causing the coloured ribbon of the spec-trum to form on the screen onthe left. The red end of the ribbon is on the left, the violet…
Astronomy
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