Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 348
Fig. 223 REFRACTION OF LIGHT 325 fied in shape so that its cross-section would look like Fig.224, b, we should call it a lens, and, since one of its surfaces … b c d e Fig. 224.—Typical lenses. is plane, while the other is convex, it would be called aplano-convex lens; if the plane surface were made convexalso, it would be called a double-convex lens (a) ; if one sur-face were plane while the other were concave, as repre-sented at e, it would be a…
Physics
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