index of refraction

Definitions

  • WordNet 3.6
    • n index of refraction the ratio of the velocity of light in a vacuum to that in a medium
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Webster's Revised Unabridged Dictionary
    • Index of refraction See under Index.
    • Index of refraction (Opt) the number which expresses the ratio of the sine of the angle of incidence to the sine of the angle of refraction. Thus the index of refraction for sulphur is 2, because, when light passes out of air into sulphur, the sine of the angle of incidence is double the sine of the angle of refraction.
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Usage

In literature:

The index of refraction of ebonite was found by Profs.
"Scientific American Supplement, No. 288" by Various
The 'index of refraction' of a ray passing from air into water is 4/3.
"Six Lectures on Light" by John Tyndall
If balsam of copaiba is made use of, the index of refraction of which is 1.50, a symmetrical field of about 24 deg.
"Scientific American Supplement, No. 441, June 14, 1884." by Various
The effects so produced are the differential results of the change of figure and of refractive index.
"On Laboratory Arts" by Richard Threlfall
The refractive index of gypsum is 1.54, but heat none, being opaque.
"The Chemistry, Properties and Tests of Precious Stones" by John Mastin
But when a transparent solid is immersed in a liquid of the same refractive index as itself, it immediately disappears.
"Fragments of science, V. 1-2" by John Tyndall
This corresponds to an index of refraction of 1.69.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2" by Various
The eye sees what is presented but the inversions and other peculiar effects are due to variations in the refractive index of the atmosphere.
"Visual Illusions" by Matthew Luckiesh
The diamond has the highest refractive index of any gem-stone (2.42).
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5" by Various
Compute the speed of light in water, the index of refraction being 1.33.
"Physics" by Willis Eugene Tower
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In news:

Refractive Index vs Refraction of Light.
Nearly identical to the natural lens of the human eye, the technology behind the artificial lens is called "GRIN" or gradient refractive index optics.
Revision of D7419 - 07 Standard Test Method for Determination of Total Aromatics and Total Saturates in Lube Basestocks by High Performance Liquid Chromatography (HPLC) with Refractive Index Detection.
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In science:

It has been shown that FTL information transfer is indeed possible using bandlimited signals when passed through sufficiently long media with unity gain, a positive index of refraction less than unity, and zero or low dispersion ,over the signal frequency range.
On Superluminal Propagation and Information Velocity
The only constraint is placed on the refractive index profile over the range of interest.
On Superluminal Propagation and Information Velocity
Several values of the refraction index were investigated because of their suitability for the intermediate and high momentum range of particle identification.
Experimental study of a proximity focusing Cherenkov counter prototype for the AMS experiment
The mean refraction index calculated taking into account the Cherenkov light energy distribution and the quantum efficiency of the PMT photocathode is < n >= 1.332.
Experimental study of a proximity focusing Cherenkov counter prototype for the AMS experiment
AGLs however are currently the only available material to cover certain range of refraction index and then of particle velocity (see for details).
Experimental study of a proximity focusing Cherenkov counter prototype for the AMS experiment
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