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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

## Physical Arithmetic

Alexander Macfarlane - Mathematics - 1885 - 357 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...

## New theorie of matter and of force

...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...

## Physical Arithmetic

Alexander Macfarlane - Mathematics - 1885 - 357 pages
...medium B, it is bent out of its former straight course in such a manner that the ratio of the sino of the angle of incidence to the sine of the angle of refraction is constant. This physical ratio is expressed by p. L parallel per L along in A — L parallel per L along...

## A Dictionary of Terms Used in Medicine and the Collateral Sciences

Richard Dennis Hoblyn - Medicine - 1887 - 806 pages
...fore-finger ; the finger usually employed in pointing at any object. INDEX OF REFRACTION. This is the ratio of the sine of the angle of incidence to the sine of the angle of refraction when a ray of light passes from a vacuum into any medium. INDIA-RUBBER, VULCANIZED. Caoutchouc...

## Introduction to Physical Science

Alfred Payson Gage - Physics - 1888 - 353 pages
...3. The quotient (in this case f = 1.33+ ) obtained by dividing the sine of the angle of incidence by the sine of the angle of refraction is called the index of refraction. It can be proved to be the ratio of the velocity of the incident to that of the refracted light-waves....

## The Compass.\$A monthly journal for engineers, surveyors ..., Volumes 1-3

Engineering - 1891
...its course is altered, and that this change of direction varies with different media, but that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is always the same for the same medium, whatever may be, within a certain limit, the obliquity of the...

## A Text-book of Physics, Largely Experimental: On the Harvard College ...

Edwin Herbert Hall, Joseph Young Bergen - Digital images - 1891 - 388 pages
...sine of r, the angle of refraction. The general law of refraction may, then, be stated as follows: The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant quantity, for any two given adjoining media, and is called the Index of Refraction for those...

## A Text-book of Physics: Largely Experimental. On the Basis of the Harvard ...

Edwin Herbert Hall - Physics - 1891 - 388 pages
...of r, the angle of refraction. The general law of refraction may, then, be stated as follows : The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant quantity, for any two given adjoining media, and is called the Index of Refraction for those...