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
| Charles Greeley Abbot - 1911 - 542 pages
...of incidence, and the angle c 7 cB the angle of refraction. A principal law of refraction is this: The sine of the angle of incidence divided by the sine of the angle of refraction is constant for a ray of a single color entering a given substance, whatever the angle at which it... | |
| Victor Dean Hawkins - 1912 - 214 pages
...angle of refraction is the absolute index of refraction. When light passes from one medium to another, the sine of the angle of incidence divided by the sine of the angle of refraction is the relative index of refraction. This is usually written sin i — — = u sin r In general, when... | |
| United States. Department of Agriculture - 1923 - 1298 pages
...minutes or, for convenience, in what is known as the index of refraction. The index of refraction is the sine of the angle of incidence divided by the sine of the angle of refraction. The most convenient instrument for measuring this property is known as the Abb6 refractometer, a view... | |
| Sir Thomas Edward Thorpe - 1913 - 748 pages
...refracted rays lie in the same plane with the normal to the surface at the point of Fio. 1. incidence, the sine of the angle of incidence divided by the sine of the angle of refraction being a constant. In 1669, Bartholinus noticed that if a ray of light enters a crystal of Iceland spar,... | |
| Emory Leon Chaffee - 1914 - 144 pages
...is bent toward the perpendicular to the surface. For the same substances and the same colored light, the sine of the angle of incidence divided by the sine of the angle of refraction is a constant. It is called the index of refraction, and is usually denoted by the letter n. The index... | |
| Alpheus Grant Woodman - 1915 - 532 pages
...—. — prrro = • — * — = sin ^ sin 90 1 That is, in passing from a denser to a rarer medium, the index of refraction is equal to the sine of the angle of incidence for the border line of total reflection. The forms of refractometer most commonly employed in food... | |
| Alpheus Grant Woodman - 1915 - 532 pages
...sin i sin i n = . „-.i> = , = sin i sin 90 1 That is, in passing from a denser to a rarer medium, the index of refraction is equal to the sine of the angle of incidence for the border line of total reflection. The forms of refractometer most commonly employed in food... | |
| Hans Harting - 1918 - 254 pages
...light in the two isotropic media I and II, and is, therefore, constant, or: III. The sine of the angle of refraction is equal to the sine of the angle of incidence, divided by a constant number. INDEX OF REFRACTION. — These constants, that is, the ratios of the velocities... | |
| Frederick Booth - 1921 - 268 pages
...light waves decrease as the optical density of a medium increases. The index of retras.tion equals the sine of the angle of incidence divided by the sine of the angle of refraction, thus sine of the angle of incidence Index of refraction = sine of the angle of refraction Unless more... | |
| Newton Horace Winchell, Alexander Newton Winchell - 1922 - 248 pages
...occupies such a position that the index of the crystal for the extraordinary ray in the given direction is equal to the sine of the angle of incidence divided by the sine of the angle between the wave-normal and the normal to the surface. That is, if e' is the index for the extraordinary... | |
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