Gilbert light experiments for boys . and the glass plateappear shallower than they are at greater and greaterslants. Does the coinseem to rise? Why? Experiment No. disappearing a coin on edgein a tin funnel full ofwater, ask a friend tostand so that he canjust see the top overthe edge of the funnel,and then let the waterrun out. Does he find that he can no longer see the coin from where he stands? Why? Experiment No. 74. A broken looking-glass. Play this trick onyour family. Take a piece of soap and mark a star with radiatinglines near one edge of a looking-glass (Fig. 124). Th
Gilbert light experiments for boys . and the glass plateappear shallower than they are at greater and greaterslants. Does the coinseem to rise? Why? Experiment No. disappearing a coin on edgein a tin funnel full ofwater, ask a friend tostand so that he canjust see the top overthe edge of the funnel,and then let the waterrun out. Does he find that he can no longer see the coin from where he stands? Why? Experiment No. 74. A broken looking-glass. Play this trick onyour family. Take a piece of soap and mark a star with radiatinglines near one edge of a looking-glass (Fig. 124). The family willthink the glass is broken. A real break shows up because thelight is refracted at the break and this gives a fair is the Fish? The three boys 1, 2, and 3 in Fig. 125 are looking atthe same fish andthey see it at thethree different posi-tions 1, 2, and 3,because the lightfrom the fish is bentmore the greater theslant it has when itreaches the watersurface. None ofthem see the fishFig. 123 (2) where it 80 GILBERT BOY ENGINEERING
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificrecreation
