Brewster, David, Sir, 1781-1868, Bache, A. D. (Alexander Dallas), 1806-1867 · Philadelphia : Lea and Blanchard · leaf 229
iolet innermost.Now, since in a shower of rain there are drops in all positionsrelative to the eye, the eye will receive spectra inclined at allangles to the horizon, so that when combined they will formthe large circular spectrum which constitutes the rainbow. * In the College edition, see… … directions R E, R F; out of the whole beam of light whichfalls upon the drop, those rays which pass through or near theaxis of the drop will be refracted to a focus behind it, butthose which fall on the upper side of the drop will be refracted,the red rays least, and the violet most, and will fall…
Optics
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