Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 110
made,and r, g, b, are those of the other, if tlie lenses areplaced so as to counteract each other, and are of suchcurves that the reds and violets are combined, the greenswill remain slightly outstanding. Suppose, as in thedrawing, the second prism disperses the violet as muchas the first one does,… … Fir;. 46.—Diagram Illustrating the Irrationality of the Spectrum, prism so that the green and red are correct, then theviolet will be slightly outstanding, which in practice isnot much noticed, except with a very bright objectwhen there is always outstanding colour. This is, however, not a matter…
Astronomy · Telescopes
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