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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. "
Manual of optics, by J.A. Galbraith and S. Haughton - Page 18
by Joseph Allen Galbraith - 1854
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A Manual of Clinical Ophthalmology

Howard Forde Hansell, James H. Bell - Eye - 1892 - 231 pages
...of light which pass through it, away from the direction pursued by them before entering it, or the ratio of the sine of the angle of incidence to the sine of the angle of refraction. The index of refraction of air is taken as I, that of water, as 1.336 (sin. : i. : sin....
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Advanced Physiography

Sir Richard Gregory - Geomorphology - 1893 - 277 pages
...follows : — (1.) The incident ray, the normal, and the- refracted ray all lie in one plane. (2.) The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant quantity so long as the media from and to which the light is passing remain the same. If...
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Elements of Physics for Use in Secondary Schools

S. P. Meads - Physics - 1894 - 288 pages
...incidence. Measure CM the sine of the angle of refraction. Divide DA by CE. The index of refraction is the ratio of the sine of the angle of incidence to the sine of the angle of refraction. This is constant for any two substances, whatever be the angle of incidence. The index...
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Heat and Light an Elementary Text Book Theoretical and Practical ...

Sir Richard Tetley Glazebrook - Heat - 1894 - 207 pages
...called the refractive index of the medium. To find the refractive index, then, we require to know the ratio of the sine of the angle of incidence to the sine of the angle of refraction. If the medium from which the light is incident be air, then for all transparent bodies...
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Heat and Light: An Elementary Text-book Theoretical and Practical

Sir Richard Glazebrook - Heat - 1894 - 434 pages
...Treatise, Pitt Press Math. Series. for two given media the value of the ratio sin </sin <', ie the ratio of the sine of the angle of incidence to the sine of the angle of refraction was constant for all angles of incidence. In Table I. are tabulated in the first two columns...
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Light: An Elementary Textbook, Theoretical and Practical for Colleges and ...

Sir Richard Glazebrook - Light - 1894 - 213 pages
...REFKACTION AT PLANE SURFACES. 53 for two given media the value of the ratio sin </sin <f>', ie the ratio of the sine of the angle of incidence to the sine of the angle of refraction was constant for all angles of incidence. In Table I. are tabulated in the first two columns...
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Anomalies of Refraction and of the Muscles of the Eye

Flavel Benjamin Tiffany - Eye - 1894 - 307 pages
...other as A : iV or as 4:3. The quotient \, obtained by dividing the sine of the angle of incidence by the sine of the angle of refraction, is called the index of refraction, being the index of refraction of light in passing from air into water. In passing from air into...
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Johnson's Universal Cyclopedia: A New Edition, Volume 7

Charles Kendall Adams - Encyclopedias and dictionaries - 1895
...the direction of either ray in a double refracting medium, see POLARIZATION. Index of Refraction. — The constant ratio of the sine of the angle of incidence to the sine of the angle of refraction when a ray of homogeneous light passes through the bounding surface between two media. Thus...
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A Manual of Physiology: With Practical Exercises

George Neil Stewart - Physiology - 1895 - 796 pages
...two media. For purposes of comparison, the refractive index of a substance is usually taken as the ratio of the sine of the angle of incidence to the sine of the angle of refraction of a ray passing from air into the substance. When a ray strikes a surface at right angles,...
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Elements of Physics

S. P. Meads - 1896
...incidence. Measure CE the sine of the angle of refraction. Divide DA by CE. The index of refraction is the ratio of the sine of the angle of incidence to the sine of the angle of refraction. This is constant for any two substances, whatever be the angle of incidence. The index...
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