Hall, Edwin Herbert, 1855-1938 · New York, H. Holt and company · leaf 161
ed as lyingin the straight line between A and B. It is usually so * The dotted lines drawn from Mand N to Fin Fig 110 are notintended to show the actual course of the rays within the eye. 148 PHYSICS. represented in books. Exercise 25 shows that it does notlie there, The image AB is evidently… … i -^^— Fig. 110. look if held at a comfortable seeing-distance from the eye.Hence the name magnifying-glass^ so commonly given to alens used as in Fig. 110. 146. Application of Formula.—The formula used in§ 140 to express the relation betweeen focal length, object-distance, and image-distance in…
Physics
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