Andrews, Ernest John, 1863-, Howland, Howard Newell, 1865- joint author · New York, London, The Macmillan company · leaf 363
surroundedby its atmosphere which is densernearer the surface. Rainbows arecaused by refraction and reflection,as will be explained in the followingsection. The wavy appearance ofhot air arising from a stove or other heated object iscaused by the rays of light being refracted while passingthrough… … Fig. 230. §580] CHROMATICS 349 EXERCISES 1. What effect does flattening a double-convex lens have onthe location of the image ? Why ? 2. If the upper side of a vertical converging lens is flattenedmore than the lower side, what effect will it have on theappearance of the image? 3. If the upper side…
Physics
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