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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. "
A Treatise on Optics - Page 22
by David Brewster, Alexander Dallas Bache - 1833 - 95 pages
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Cyclopædic science simplified

John Henry Pepper - 1877 - 764 pages
...but since BAF is known, the angle of refraction BRN is also known ; and the angle of incidence HRB being found by the preceding methods, we may determine...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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Principles of Chemical Philosophy

Josiah Parsons Cooke (Jr.) - 1881 - 648 pages
...refraction, we readily deduce another value for the index of refraction ; and it is usually denned as the sine of the angle of incidence divided by the sine of the angle of refraction. Moreover, according to the well-known law of refraction, not only is this ratio constant for any incidence,...
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Sound, light and heat

Alfonzo Gardiner - 1881 - 214 pages
...The sine of the angle of incidence bean a fixed proportion to the sine of the angle of refraction; or the sine of the angle of incidence, divided by the sine of the angle of refraction, is (for the same two media) always a constant quantity (ie, the same number^, which is called the "...
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The Microscope and Its Revelations, Volumes 1-2

William Benjamin Carpenter, William Henry Dallinger - 1891 - 1210 pages
...the other medium the refracted ray. The incident and refracted rays are always in the saine plane. 2. The sine of the angle of incidence divided by the sine of the angle of refraction is a constant quantity for any two particular media. When one of the media is air (accurately a vacuum)...
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A Student's Manual of a Laboratory Course in Physical Measurements

Wallace Clement Sabine - 1893 - 154 pages
...is bent toward the perpendicular to the surface. For the same substances and the same colored light, the sine of the angle of incidence divided by the sine of the angle of refraction is a constant. It is called the index of refraction, and is usually denoted by the letter «. The index...
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Diseases of the eye

George Edmund De Schweinitz - 1893 - 698 pages
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Sunshine

Amy Johnson - 1894 - 604 pages
...deal, eg 98 '2 °/0 of rays incident normally upon water. 20. The law of refraction is thus stated : " The sine of the angle of incidence divided by the sine of the angle of refraction is a constant quantity." We obtained the sines of these angles. This constant quantity is called the...
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Wilson's Cyclopedic Photography: A Complete Handbook of the Terms, Processes ...

Edward Livingston Wilson - 1894 - 538 pages
...divide o' m' by n' rf, we will have in both cases the same quotient ; or, as it is generally expressed, the sine of the angle of incidence divided by the sine of the angle of refraction is a constant, whatever the angle of incidence may may be. This constant quota is called. the index...
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Light and Electricity: Notes of Two Courses of Lectures Before the Royal ...

John Tyndall - 1895 - 220 pages
...the line np will be the sine of the angle of refraction. 117. Hence the ill-important optical law — The sine of the angle of incidence divided by the sine of the angle of refraction is a constant quantity. However these angles may vary in size, this bond of relationship is never severed....
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Physics for Students of Medicine

Alfred Daniell - 1896 - 496 pages
...directions are. The angle of reflexion is equal to the angle of incidence : and the sine of the angle of refraction is equal to the sine of the angle of incidence multiplied by the index of refraction. If the incident light travel along a line Av O, at right angles...
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