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" 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. "
Notes of a Course of Nine Lectures on Light: Delivered at the Royal ... - Page 4
by John Tyndall - 1870 - 74 pages
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On the Connexion of the Physical Sciences

Mary Somerville - 1834 - 484 pages
...discovered by Sir David Brewster, ' That the tangent of the polarizing angle for any medium is equal to the sine of the angle of incidence divided by the sine of the angle of refraction of that medium.' Whence also the refractive power even of an opaque body is known when its polarizing...
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The Connection of the Physical Sciences

Mary Somerville - 1834 - 390 pages
...discovered by Sir David Brewster, ' That the tangent of the polarizing angle for any medium is equal to the sine of the angle of incidence divided by the sine of the angle of refraction of that medium.' Whence also the refractive power even of an opaque body is known when its polarizing...
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A Treatise on Optics

David Brewster - 1841 - 432 pages
...angle of incidence, so is unity to the index of refraction ; or the index of refraction is equal to the sine of the angle of incidence divided by the sine of the angle of retraction. (36.) By this method, which is very simple in practice, \ve may readily measure the refractive...
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On the Connexion of the Physical Sciences

Mary Somerville - 1849 - 568 pages
...discovered by Sir David firewater, "That the tangent of the polarizing angle for any medium is equal to the sine of the angle of incidence divided by the sine of the angle of refraction of that medium." Whence also the refractive power even of an opaque body is known when its polarizing...
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The Dynamical Theory of the Formation of the Earth, Volume 2

Archibald Tucker Ritchie - 1850 - 648 pages
...discovered by Sir David Brewster : ' that the tangent of the polarizing angle for any medium is equal to the sine of the angle of incidence, divided by the sine of the angle of refraction of that medium ;' whence also the refractive power even of an opaque body is known, when its polarizing...
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An Elementary Introduction to Mineralogy

William Phillips - 1852 - 732 pages
...ratio depending only on the medium into which the refraction takes place, and the nature of the light. The sine of the angle of incidence divided by the sine of the angle of refraction is denoted by the quantity /*. This quantity is called the refractive index of the medium. 241. In crystals...
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The Human Mind: a Discourse on Its Acquirements and History, Volume 2

Stephen Watson Fullom - 1858 - 346 pages
...laid down in the simple law — that the tangent of the polarizing angle for any medium is equal to the sine of the angle of incidence divided by the sine of the angle of refraction of that meridian. The subject of polarization has largely occupied the scientific world, and the interesting...
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Mechanics, hydrostatics, pneumatics, optics

Ireland commissioners of nat. educ - 1861 - 310 pages
...is tangent to the angle of polarization :" and "the tangent of the angle of polarization is equal to the sine of the angle of incidence, divided by the sine of the angle of refraction corresponding to the given medium." This enables us to ascertain the angle of refraction, belonging...
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A Manual of Spherical and Pratical Astronomy: Embracing the ..., Volume 1

William Chauvenet - 1864 - 720 pages
...the index of refraction for that medium. This index is always an improper fraction, being equal to the sine of the angle of incidence divided by the sine of the angle of refraction. 4th. When the ray passes from one medium into another, the sines of the angles of incidence and refraction...
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Cyclopadic Science Simplified

John Henry Pepper - 1869 - 722 pages
...angle of incidence, so is unity to the index of refraction ; or the index of refraction is equal to the sine of the angle of incidence divided by the sine of the angle of refraction. By this method we may readily measure the refractive power of all bodies. If the body be solid, it...
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