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" According to the wave theory of light, the index of refraction of a medium is equal to the ratio of the velocity of light in vacuum to that in the medium. "
Light for Students - Page 307
by Edwin Edser - 1902 - 579 pages
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elementary treatise on nautral philosophy

a. privat deschanel - 1873 - 1076 pages
...incident and refracted light. The relative index of refraction from one medium into another is therefore the ratio of the velocity of light in the first medium to its velocity in the second; and the absolute index of refraction of any medium is inversely as the...
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Sound and light

Augustin Privat-Deschanel - Physics - 1881 - 318 pages
...incident and refracted light. The relative ' index of refraction from one medium into another is therefore the ratio of the velocity of light in the first medium to its velocity in the second; and the absolute index of refraction of any medium, is inversely as the...
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A Treatise on Physical Optics

Alfred Barnard Basset - Physical optics - 1892 - 450 pages
...than one theory, that the index of refraction of light, which passes from a vacuum into a transparent medium, is equal to the ratio of the velocity of light in vacuo, to the velocity of light in the transparent medium; hence the velocity of light in a dispersive...
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Optics: A Manual for Students

Archibald Stanley Percival - Achromatism - 1899 - 422 pages
...refraction are in a constant ratio for the same two media. This constant ratio is really identical with the ratio of the velocity of light in the first medium to its velocity in the second; it is usually denoted by the symbol fj.. We may therefore express the second...
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Elements of Physics

Charles Hanford Henderson, John Francis Woodhull - Physics - 1900 - 416 pages
...cause of headaches. 320. The Spectrum. — We have seen that the index of refraction is in reality the ratio of the velocity of light in the first medium to the velocity in the second medium, and we have assumed that we had to deal with homogeneous 334 rays...
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An Introduction to the Study of Spectrum Analysis

William Marshall Watts - Spectrum analysis - 1904 - 414 pages
...refraction. The ratio ac : bf\s called the index of refraction, usually denoted by p., it is simply the ratio of the velocity of light in the first medium to the velocity in the second medium.* We have now to consider the phenomenon known as the interference...
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Physics for College Students

Henry Smith Carhart - Physics - 1910 - 650 pages
...BC=ACsin i=vt, AD = AC sin r = v't. Whence sm i _ vt^ sin r v't (56) The index of refraction is therefore equal to the ratio of the velocity of light in the first medium to the velocity in the second, and the constancy of the ratio of the sines has now a physical significance....
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Outlines of Physical Chemistry

George Senter - Chemistry, Physical - 1911 - 456 pages
...ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant, and is equal to the ratio of the velocity of light in the two media. The ratio in question is termed the index of refraction, and is usually represented by the...
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Transactions of the American Society for Steel Treating, Volume 3

American Society for Steel Treating - Metallurgy - 1923 - 1028 pages
...the beam, there will be a change of direction. The numerical value of the refractive index is always the ratio of the velocity of light in the first medium to its velocity in the second, and when light passes into a medium of greater density, the index is greater...
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College Physics

Alexander Wilmer Duff - Physics - 1925 - 538 pages
...1.00029.) We have already seen that on the wave theory the index of refraction is equal to the radio of the velocity of light in the first medium to that in the second, and this is often taken as the definition of the index of refraction (§ 407). Strictly speaking, in...
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