 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 22by David Brewster, Alexander Dallas Bache - 1833 - 95 pagesFull view - About this book
 | Franklin Institute (Philadelphia, Pa.) - 1876 - 600 pages
...divide o'm' by n'p', 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 be. This constant quotient is called the index of... | |
 | 1862 - 700 pages
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