A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 564
IPf B Fig. 488.—Shadow when source of light is not a point. if a screen be placed at A, there will be a small region of denseshadow surrounded by a large region of half shadow, but if the … Fig. 489.—Shadow with source of considerable size. screen be placed at B, there will be no complete shadow, merely alarge, diffuse half shadow. 540 LIGHT chap. Expt. 112.—Shadows. Cut a hole of 10 cm. diameter in a sheet of card-board, and cover the hole with oiled paper. Behind this place the…
Physics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
