Carhart, Henry S. (Henry Smith), 1844-1920 · Boston : Allyn and Bacon · leaf 287
For converging lenses /has been shown to be negative.Then P f When -P - , or where v >•/, q must be negative, orfobject and image are on opposite sides of the lens ; but when — >>,,, or when p <^/, q is positive, or the image is on the same side of the lens with the object and is… … Fig. 137. REFLECTION AND REFRACTION. 277 which the conjugate foci A and A are on opposite sides ofthe double convex lens. Fig. 138 illustrates the secondcase. A and A are both on the same side of the lens.
Physics
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