Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 643
of his discoveries and improvements, thename of Galileo has always been connected with the formof telescope which he used. The Galilean telescope consists of a negative lens, a (Fig.432), close to the eye, and a positive lens, 5, at a certain dis-tance from the first depending on its power. For the… … Fig. 432. =—-C, —-c is in substan-tial accordL\ with the fact in the instru- ment as it now survives. In this case the waves suffer no change ofcurvature in passing into the eye, and if the lens havesuch a position that waves from a distant source havetheir centers of curvature after passing it on…
Physics
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