Fig. 32. 50 LIGHT. [CH. IV EXPERIMENT (9). To shew the refraction of light. (a) Take a bowl or vessel with opaque sides. Place somesmall object such as a coin at the bottom and move back fromthe vessel until the coin is just hidden below the upper edgeof the side. Pour some water into the vessel;… … Fig. 33. now visible. A pencil of rays from any point such as P, fig.33, on the coin could not, before the water was poured in, reachthe eye; when the vessel is filled the rays are bent down andenter the eye, appearing to diverge from a point such as Pnearer the surface than P. The whole coin is…
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