Carhart, Henry S. (Henry Smith), 1844-1920 · Boston : Allyn and Bacon · leaf 287
t article we have seen that for diverging lenses/ is always positive. Now since p, the distance of theobject, is necessarily positive, q must be positive andsmaller than p. The image is therefore on the same sideof the lens as the object, it is virtual and nearer the lens 276 LIGHT. than the… … 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…
Physics
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