Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 117
sed in lenses andprisms. These will be discussedlater. We have mentioned the effectof looking at a straight linethrough a poor grade of windowglass. Explain this. It is a common thing to noticethe wavy effect above a fire or stove (Figure 84). This isnot heat waves, as so many think; but it is due… … Figure 84.—Refraction of Lightabove a Hot Stove. CRITICAL ANGLE 107 Our atmosphere acts as a refracting substance to thesuns rays. For this reason we can actually see the sun ( Sun jEvening
Physics
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