 It may also be defined as the sine of the angle of incidence divided by the sine of the angle of refraction, as light passes from air into the substance.  A Treatise on Optics - Page 22by David Brewster, Alexander Dallas Bache - 1833 - 95 pagesFull view - About this book
 | United States. Army Topographic Command - 1969 - 292 pages
...snakeslip— See etch slip. snap marker— See point marker. Snell's law of refraction— This law states that the sine of the angle of incidence divided by the sine of the angle of refraction equals a constant termed the index of refraction when one of the media is air. The index of refraction... | |
 | Mary Somerville - 1846 - 504 pages
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 | John Daintith - 1977 - 354 pages
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 | 1980 - 424 pages
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