Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 345
rface (see Fig. 218).Clear water appears less deep than it really is. The hot airover the surface of a desert bends the rays of light andproduces the mirage, the appearance of reflection in water. 22 322 PHYSICS Precious stones owe their brilliancy to high refractivepower, and consequently to total… … ^^ ^=^ 5^ ^^ INDEX OF TURPENTINE -—1.47 CARBON BISULPHIDE 1.67 Fig . 219 Fig. 218.—Eefraction. total reflection within the stone, and finally emerges in pen-cils of light, which produce the magnificent fire and sparkleof the gem. Many of the rays of light are so refracted asto produce prismatic…
Physics
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