Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 203
rror is a section ofa sphere which reflects from its exterior surface. The fociof such mirrors are found in the same way as with concave mirrors. Fig. 218 shows thefocus F of parallelrays. The perpen-diculars Ca,Cb, etc.are drawn throughthe mirror. Fig. 218. The ray Ar is reflected in the direction…
Physics
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