Introductory course of natural philosophy for the use of schools and academies. Ed. from Ganot's popular physics. By William G. Peck (1869)
Ganot, Adolphe, 1804-1887, Peck, William Guy, 1820-1892 · New York A.S. Barnes · leaf 269
of a vertical screen of ground glass, A, and avertical solid rod, B, situated a short distance in front of it. (rive some illustrations of the immense velocity of light. (265.) What is theIntensity of Light? How does it vary with the distance? What is a Photometer ?Explain the one shown in Fig.… … Fig. 15& equal lights he placed at twice the distance, the shadowswill he of the same tint; this is the case shown in the figure.It will require nine equal lights at three times the distance,sixteen at four times the distance, and so on, to produce thesame effect. This experiment confirms the…
Physics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
