Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 25
s on B? Is it, therefore, onlyone-fourth as intense on B as it ison A? Place B 3 feet from thecandle. Does the light now cover9 square inches? Is it, therefore,only one-ninth as intense? Thisproves that the intensity of lightvaries inversely as the square ofthe distance. Experiment No. 16. A… … (Fig.29). Is it bright? It is darkerthan the paper in the first case andbrighter in the second, because morelight goes through the greased spotthan through the paper. Experiment No. 17. Four can-dles against one. Put four candles2 feet from the greased-spot screenand one candle 1 foot on the…
Light · Scientific recreations
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
