 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.  An Elementary Text-book of Physics: Light - Page 128by Robert Wallace Stewart - 1909Full view - About this book
 | Royal Society (Great Britain) - Electronic journals - 1832 - 564 pages
...elementary, yet lead to results of a less obvious nature. rliiey are as follows; — 1. In all refractions the ratio of the sine of the angle of incidence to the sine of the angle of refraction, is constant. 2. If between two refracting mediums a third medium, terminated by parallel surfaces', be inter.posed,... | |
 | 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 - 524 pages
...objects in the zenith enter the atmosphere perpendicularly) in accordance with the optical law that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. At the end of the volume we have given a table of refractions containing the correction for refraction... | |
 | Charles William Hackley - Trigonometry - 1851 - 536 pages
...of 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
...incidence and 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
...and the 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 the ray originally... | |
 | Joseph Allen Galbraith - 1854 - 90 pages
...are so 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 refractive index... | |
 | Frank Grant Johnson - Physics - 1856 - 98 pages
...piece of 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
...air, and the refracted ray through glass. If the semi-cylinder AMB, instead of glass, be water, then the ratio of the sine of the angle of incidence to the sine of the angle of refraction will be 4 to 3, so that we shall have I N_4 RP~3' !'# 4 R'p'~3' i" N" _ 4 R"P"~3' and so... | |
 | William Holms Chambers Bartlett - Optics - 1859 - 408 pages
...refraction. It is the 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... | |
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