Gilbert light experiments for boys . 78 GILBERT BOY ENGINEERING. Fig. 121. The light is bentFrom Black and Davis Practical Phys-ics, published by The Macmillan Co. inches (Fig. 122). Does thepart under water appear to beonly 3 inches long when viewedvertically? It does, becauselight travels in water onlythree-fourths as fast as it doesin air. Does it appear much shal-lower when viewed at a slant?It does, because light is bent more the greater the angle at whichit leaves the water. Experiment No. 70. An elastic ruler. Shove the ruler tothe bottom of a pail of water and lift it out. Does it appe
Gilbert light experiments for boys . 78 GILBERT BOY ENGINEERING. Fig. 121. The light is bentFrom Black and Davis Practical Phys-ics, published by The Macmillan Co. inches (Fig. 122). Does thepart under water appear to beonly 3 inches long when viewedvertically? It does, becauselight travels in water onlythree-fourths as fast as it doesin air. Does it appear much shal-lower when viewed at a slant?It does, because light is bent more the greater the angle at whichit leaves the water. Experiment No. 70. An elastic ruler. Shove the ruler tothe bottom of a pail of water and lift it out. Does it appear tostretch? Experiment No. 71. Magic glass. Stand a ruler at one endof the glass prism held on one edge, Fig. 123 (1). Does thebottom appear only two-thirds its real depth when viewed ver-tically? It does, because light travels only two-thirds as fastin glass as it does in air. Does it appear even shallower when viewed at a slant? Itdoes, because light is bent more the greater the angle at whichit leaves the glass. Repeat this withthe prism on end. Repeat wi
Size: 2045px × 1222px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificrecreation
