Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 682
ver, one special casein which the refraction at a spherical surface is geometricallvperfect, and the peculiar advantage of the hemispherical frontlens is that it utilizes this case. Let Fig. 445 represent a piece of glass bounded on the leftby a polished spherical surface having c as its center,… … 67i EFFICIENCY OF OPTICAL IXSTEUMEXTS. cal form on refraction; bnt there is one position of this pointfor which the waves suffer refraction with considerable chancreof curvature, but still remain strictly spherical. To find itsposition, suppose that light proceeding from pt in the direc-tion of a…
Physics
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