 | Harvey Goodwin - Mathematics - 1849 - 588 pages
...surface, the distance of the geometrical focus from the surface is to its distance from the centre, as the sine of the angle of incidence to the sine of the angle of refraction. There will be four different cases, 1. A concave surface; the rays passing from a rarer... | |
 | Charles William Hackley - Trigonometry - 1851 - 536 pages
...refraction being 35o 11', to find the index of refraction. NOTE. — The index of refraction ia the ratio of the sine of the angle of incidence to the sine of the angle of refraction. Ans. *8. • The force down an inclined plane is to the force of gravity, aa the height... | |
 | Dionysius Lardner - Astronomy - 1851 - 804 pages
...refraction is always the same. 980. Index of refraction. — The number which thus expresses the ratio of the sine of the angle of incidence to the sine of the angle of refraction, and which in the case of air and glass is j} or 1-5, and in the case of air and water is... | |
 | James R. Christie - Astronomical instruments - 1853 - 140 pages
...effect is known by the term " refraction." The angle MBL is the " angle of refraction," and the ratio of the sine of the angle of incidence to the sine of the angle of refraction is found to be constantly the same for the same substance, when the medium through which... | |
 | Joseph Allen Galbraith - 1854 - 90 pages
...related to each other, that their sines are in a constant ratio. DEFINITION. — The constant ratio of the sine of the angle of incidence to the sine of the angle of refraction is called the index of refraction. Every different transparent body in nature has its own... | |
 | Frank Grant Johnson - Physics - 1856 - 98 pages
...money, to llustrate refraction of light. FIG. 18. Illustrates the law of refraction, that the ratio of the sine of the angle of incidence to the sine of the anglo of refraction, is constant. FIG. 19. (On the left.) Shows a ray of light refracted by a triangular... | |
 | Dionysius Lardner - Optics - 1858 - 308 pages
...refraction is always the same. 980. Index of refraction. — The number which thus expresses the ratio of the sine of the angle of incidence to the sine of the angle of refraction, and which in the case of air and glass is J or 1-5, and in the case of air and water is... | |
 | William Holms Chambers Bartlett - Optics - 1859 - 408 pages
...ratio of the velocity of the incident to that of the deviated light, which is equal to the ratio of the sine of the angle of incidence to the sine of the angle of refraction or of reflexion, according as m is positive or minus unity. The numerical value of m, has... | |
 | Stephen Parkinson - Optics - 1859 - 344 pages
...refracting angles, he ascertained that for a ray corresponding to any one of the fixed lines, the ratio of the sine of the angle of incidence to the sine of the angle of refraction was invariable,— thus affording the strongest corroboration of the law of refraction (Art.... | |
 | Désiré van Monckhoven - Photographic lenses - 1867 - 296 pages
...refracted ray, and the normal, are all in the same plane. 2nd. For the same two media, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant, whatever may be the angle of incidence. This law has received the name of "... | |
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When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media. 
