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 - 1304 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 - 752 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 - 244 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 - 272 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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