 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.  A Treatise on Geometrical Optics - Page 15by Robert Alfred Herman - 1900 - 344 pagesFull view - About this book
 | Joseph David Everett - 1878 - 340 pages
...the case of water and air is \. The general law of refraction may be stated in the following words : the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant when the two media are given, and is called the index of refraction from the first medium... | |
 | Augustin Privat-Deschanel - 1878 - 314 pages
...that of a direct ray. Fig. 651.—Apparatus for Verifying the Law. 724. Indices of Refraction.—The ratio of the sine of the angle of incidence to the sine of the angle of refraction, when a ray passes from one medium into another, is called the relative index of refraction... | |
 | Robert Ellis Dudgeon - 1878 - 144 pages
...the angle of refraction as the index of refraction of the lens is to i. Thus if the lens be of water, the sine of the angle of incidence to the sine of the angle of refraction will be as i • 3 to i ; if of glass, as i • 5 to i ; if of diamond, as 2 -4 to I, and... | |
 | Adolphe Ganot - 1881 - 556 pages
...relative indices of refraction for the two media. When a ray passes from a vacuum into any medium, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is always greater than unity, and is called the absolute Mex of refraction, or simply the index of refraction... | |
 | Augustin Privat-Deschanel - 1881 - 318 pages
...the course of a returning ray is the same as that of a direct ray. 724. Indices of Refraction. — The ratio of the sine of the angle of incidence to the sine of the angle of refraction, when a ray passes from one medium into another, is called the relative index of refraction... | |
 | Conwy Lloyd Morgan - 1882 - 238 pages
...bent towards this perpendicular. 1541. In water at whatever oblique angle the ray strikes the surface, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is 1.336. In other substances the ratio is different. 1542. If instead of passing from the less to the... | |
 | Henry Kiddle - 1883 - 296 pages
...being greater or less than the former, according to the relative density of the refracting medinm. The ratio of the sine of the angle of incidence to the sine of the angle of refraction is called the index of refrnction.\ It varies with the medinm, * " To account for refraction, let us for... | |
 | Hermann Wilhelm Vogel - 1883 - 352 pages
...are what mathematicians call the sines of the angles. Thus ad is the sine of i, and bf the sine of r. The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. This ratio is, when light leaves air for water, 4 to 3 ; that is, the sine bf is f times... | |
 | Alexander Macfarlane - 1885 - 412 pages
...medium A into another medium B, it is bent out of its former straight course in such a manner that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. This physical ratio is expressed by /t L parallel per L along in A — L parallel per L along... | |
 | William Barlow (of Muswell Hill.) - 1885 - 422 pages
...since the ratio of the velocity in the incident waves to the velocity in the refracted waves is that of the sine of the angle of incidence to the sine of the angle of refraction, y\ TJ« and jj-jj = sine of the angle of incidence, f1 H and jTy- = sine of the angle of... | |
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