Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 122
e World. LENSES 136. Lenses. — A lens is a transparent body of such ashape that it will focus rays of light. There are two general classes of lenses : (a) con-verging, (b) diverging. A converging lens is alens ivhich tends to bringthe rays together after theypass through. (Figure93.) A diverging… … Figure 93.— Light Passing through aConverging Lens. 112 REFRACTION AND LENSES lenses that are thicker at the center than at the edges areconverging, while those thinner at the center than at theedges are diverging. 137. Meaning of Terms.— Theline drawn through the centers ofcurvature of the two…
Physics
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