Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 341
carbon bisulphide, 1.67; intodiamond, 2.75. It is manifest from this that optical density is not thesame as ordinary density; for, although ether, alcohol, andturpentine are all lighter than water, they have a largerindex of refraction. This is illustrated in Fig. 219. Thefollowing laws are found… … Fig. 215.—Eefraction. REFRACTION OF LIGHT 319 the two media, it is bent toward the perpendicular to thatsurface; or, conversely, if it passes from a denser into ararer medium, it is bent away from the perpendicular. 3. The index of refraction is always a constant value forany two given media,…
Physics
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