Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 106
edges toward the center. Theselenses diverge parallel rays and make them appear to comefrom a point F, called an unreal or virtual focus. FUN WITH SUNLIGHT Experiment No. 98. pass through the slit ining lens in the beam(Fig. 157) and make adust. Do you see thatthe light comes to apoint and diverges… … Fig. 157. You see a brilliant focus in dusty ail 104 GILBERT BOY ENGINEERING Experiment No. 99. Diverging lens. Re-peat this experimentwith your diverginglens. Is the light di-verged or spread? ExperimentNo. 100. Focal lengths.Remove your shutter, Fig. 158. You measure the focal length focus the…
Light · Scientific recreations
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