Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
e, on account of moving in straightlines they will be excluded from the space behind the body. Thecomparative darkness thus produced is called a shadow. When the luminous body is smaller than the opaque body, the shadowof the opaque body will gradually increase in size with the distance,without… … A, E, F, of different sizes, depending upon the distance, as shown.The shadows on the screens will be larger the nearer the ball is placedto the light. If the luminous body is a mere point, the body will cast a well-defined shadow upon the screen. If either of the straight diverginglines be carried…
Physics · Astronomy
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