Gilbert light experiments for boys . Fig. 138. Why you see the sun before it rises and after it has setFrom Appletons School Physics, published by the American Book Co. after it has set because light from it is refracted by successivelayers of air which are denser the nearer they are to theearth. The direct ray SD, Fig. 138, could not be seen at A becausethe earth is in the way, but the light SB is seen because it isrefracted to A. COLOR Spectrum. When a beamof sunlight passes through aglass prism as shown in , it is spread out into acolored band called the spec-trum. This spectrum cont
Gilbert light experiments for boys . Fig. 138. Why you see the sun before it rises and after it has setFrom Appletons School Physics, published by the American Book Co. after it has set because light from it is refracted by successivelayers of air which are denser the nearer they are to theearth. The direct ray SD, Fig. 138, could not be seen at A becausethe earth is in the way, but the light SB is seen because it isrefracted to A. COLOR Spectrum. When a beamof sunlight passes through aglass prism as shown in , it is spread out into acolored band called the spec-trum. This spectrum containsall the primary colors, ofwhich those most easily rec-ognized are in order: red,orange, yellow, green, blue,indigo, and Fig. 139. A prism produces a spectrum from white lightFrom Lynde8 Physics of the Household,published by The Macmillan Co, 90 GILBERT BOY ENGINEERING
Size: 1688px × 1481px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificrecreation
