The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 298
to every form of surface,curves as well as planes, since the former may be supposedformed from an infinite number of minute planes. 270. Rays of light falling on a pkuie mirror are reflectedfrom it at the same angle as they apj)roached it, and ap-pear to j^roceed from p>oints just as far behind… … ror, on which are incident the parallel rays, P P, the diver-gent, D, and the convergent rays, c c c. The first are reflectedback to/? p parallel; the second, diverging from D, are thrownback at the same angle to d d d, and appear as if divergingfrom D, a point behuid the mirror; the third,…
Physics
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