Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 27
/2 feet, the candle power ofthe lamp is 4, 9, 16, or 20%,and so on. Each light illuminates theshadow cast by the other andtherefore when the shadows are equal the lights are equal, and thecandle power is calculated as above from the law of intensity oflight. This illustrates the shadow photometer. … Fig. 33. One candle equal to fourFrom Millihan and Gales First Course inPhysics, Ginn & Co. SHADOWS Experiment No. 21. Enlarging shadow.Move a pencil from thescreen toward thecandle (Fig. 35). Doesthe shadow increase insize? It does, becauselight goes in all direc-tions in straight linesfrom…
Light · Scientific recreations
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