Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
bottom of a pond of water when looked at obliquely, because the rays return, by total reflection, to the water, instead of emerging into the air. Fig. 27. 400. Figure 27.—Effects of refrac-tion on the risingand setting of theheavenly bodies.—Suppose the dottedline, in the diagram,to represent tlie… … 222 OPTICS. eye in the horizon. Now, as the apparent position of an object lies inthe direction in whicli the light from it passes at the point where itenters the eye, the sun will be seen on the dotted line of the horizonwhen it is actually at F, below it. Hence, heavenly bodies, by theamount of…
Physics · Astronomy
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