Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 277
he path of the light in the water visible add a drop or two of milk or a little soap solution, andto make, it visible in the air burn touch-paper or scatter alittle crayon dust in the air surrounding the jar. Observe the change in direction of the beam at the point whereit enters the water.… … Fig. 214. wholly in the shadow cast by the end of the tank nearest thecandle (Fig. 214). Now fill the tank with water. Does the shadow stillcover the whole bottom ?If not, how do you accountfor the change in theillumination 1 The change in di-rection which takesplace in rays of lightin passing…
Physics
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