Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 112
ore, the image of B is at M.We cannot trace all the rays, but it is necessary to trace only two.The two most easily traced are the parallel ray BR and the rayBP which goes through the center of the lens. Ray BR goesthrough the focus F after it goes through the lens; ray BP goesstraight ahead, or… … 110 GILBERT BOY ENGINEERING
Light · Scientific recreations
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