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" Rubicon on a certain occasion, and it is a contingent general truth that the sine of the angle of incidence bears a constant ratio to the sine... "
A System of Mineralogy: Including an Extended Treatise on Crystallography ... - Page 33
de James Dwight Dana - 1837 - 571 pages
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Library of Useful Knowledge: Natural philosophy, Volume 3

1834 - 578 pages
...important discovery of Willebrord Snell, that when a ray of light passes from one medium to another, the sine of the angle of incidence bears a constant ratio to the sine of the angle of the refraction, enabled Cassini to construct tables on a more scientific principle than had hitherto...
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Library of Useful Knowledge: Natural philosophy, Volume 3

1834 - 574 pages
...important discovery of Willebrord Snell, that when a ray of light passes from one medium to another, the sine of the angle of incidence bears a constant ratio to the sine of the angle of the refraction, enabled Cassini to construct tables on a more scientific principle than had hitherto...
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A manual for mechanics' institutions

Society for the diffusion of useful knowledge - 1839 - 380 pages
...vessel. Here the change is abrupt, but in the atmospheric refraction it is exceedingly gradual. 113. The sine of the angle of incidence bears a constant ratio to the sine of the angle of refraction for the same medium. The angle of incidence is the angle which the incident ray makes with...
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Popular Lectures on Science and Art: Delivered in the Principal ..., Volume 1

Dionysius Lardner - 1846 - 664 pages
...this refraction is also proved to be subject to the same laws as the refraction of luminous rays. Thus the sine of the angle of incidence bears a constant ratio to the sine of the angle of refraction, when the refracting medium is given, and refracting media of different kinds refract these...
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A System of Mineralogy: Comprising the Most Recent Discoveries: Including ...

James Dwight Dana - 1850 - 800 pages
...there is no refraction. But AB is the sine of the angle AEB, which is the angle of incidence, and CD is the sine of the angle CED, which is the angle of refraction....the index of refraction. In water, the ratio is as Г335 to 1. Г335 is therefore the index of refraction of water. 216. The following are the indices...
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Young Scientist: A Practical Journal for Amateurs, Volume 1

1851 - 716 pages
...themselves : — 1st. The plane of refraction coincides with the plane of incidence. 2d. For the same media, the sine of the angle of incidence bears a constant ratio to the sine of the angle of refraction. Suppose in pi. 21, Jig. 25, I to be a ray of light, incident at the same point as, and...
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Iconographic Encyclopaedia of Science, Literature, and Art, Volume 1

Johann Georg Heck - 1851 - 712 pages
...themselves : — 1st. The plane of refraction coincides with the plane of incidence. 2d. For the same media, the sine of the angle of incidence bears a constant ratio to the sine of the angle of refraction. Suppose in pi. 21, fig. 25, / to be a ray of light, incident at the same point as, and...
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A Treatise on Infinitesimal Calculus: Containing Differential and ..., Volume 1

Bartholomew Price - 1852 - 582 pages
...SPN = p sinrr», where p is constant for the same media, but varies for different media ; that is, the sine of the angle of incidence bears a constant ratio to the sine of the angle of refraction. The envelope of all the refracted rays is called the caustic by refraction of the given...
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A System of Mineralogy: Comprising the Most Recent Discoveries: Including ...

James Dwight Dana - 1854 - 864 pages
...there is no refraction. But AB is the sine of the angle AEB, which is the angle of incidence, and CD is the sine of the angle CED, which is the angle of refraction....bears a constant ratio to the sine of the angle of refraction. Tim ratio is termed the index of refraction. In water, the ratio is as 1-335 to 1. 1-335...
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A System of Mineralogy: Comprising the Most Recent Discoveries: Including ...

James Dwight Dana - 1854 - 858 pages
...This principle may therefore be thus stated : The sine of the angle of incidence Recurs a constcmt ratio to the sine of the angle of refraction. This...the index of refraction. In water, the ratio is as 1-335 to 1. 1-335 is therefore the index of refraction of water. The following are the indices of refraction...
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