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" The refractive index of a glass is defined as the ratio of the velocity of light in a vacuum to that in the glass; larger refractive indices, therefore, indicate lower velocity of light in the material. "
Quarterly Journal of the Chemical Society of London - Page 995
by Chemical Society (Great Britain) - 1888
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The Quarterly Journal of the University of North Dakota, Volume 4

University of North Dakota - 1914 - 430 pages
...of the simple lens formula is in common use in many text books, but from the reviewer's experience the definition of the index of refraction as the ratio of the velocities of the light in the two media and the continuation of this same idea in the derivation of...
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Electronic Ceramics: Properties: Devices, and Applications

Levinson - 1987 - 556 pages
...medium such as glass the velocity is lower and consequently the wavelength is proportionately smaller. The ratio of the velocity of light in a vacuum to that in any other medium is known as the index of refraction. Expressed mathematically, it is n = — (2) cm...
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Optical Mineralogy: Principles And Practice

Colin D Gribble - 2003 - 313 pages
...the angle of reflection. 4.3 The refractive index The refractive index (RI) of a medium is defined as the ratio of the velocity of light in a vacuum to that in the medium. The RI varies with wavelength (a property called dispersion), but the variation is usually...
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Sunscreens: Development: Evaluation, and Regulatory Aspects: Second Edition,

Nicholas J. Lowe - 1996 - 818 pages
...medium to another of different density. The index of refraction of a substance may also be expressed as the ratio of the velocity of light in a vacuum to its velocity in the substance. It varies with the wavelength of the incident light, temperature, and...
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Physical Processes in the Coastal Zone: Computer Modelling and Remote Sensing

Arthur P. Cracknell, E.S. Rowan - 1989 - 440 pages
...incidence or refraction in air and water respectively. The refractive index of a medium is defined as the ratio of the velocity of light in a vacuum to the velocity of light in that medium. Ordinarily, na is usually taken to be equal to 1 and for most...
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Modern Dictionary of Electronics

Rudolf F. Graf - 1999 - 540 pages
...property of a material that describes the behavior of optical energy passing through it. It is defined as the ratio of the velocity of light in a vacuum to the velocity of light in the material. It varies with wavelength. index register— 1. In a computer,...
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Concise Encyclopedia of Plastics

Donald V. Rosato, Marlene G. Rosato, D. V. Rosato - 2000 - 752 pages
...on plastics. See bloom; chalking; haze. light haze See light transmission, light index of refraction The ratio of the velocity of light in a vacuum to that in a given substance. It is the ratio of the sine of the angle of incidence to the sine of the angle ot...
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Clinical Biochemistry: Techniques and Instrumentation : a Practical Course

John S. Varcoe - 2001 - 608 pages
...clinical biochemistry is applied to liquids such as plasma and urine. The refractive index of a medium is the ratio of the velocity of light in a vacuum to that in the medium. Using air, instead of a vacuum, only introduces a small error when refractive indices of liquids...
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Signalers and Receivers: Mechanisms and Evolution of Arthropod Communication

Michael D. Greenfield - 2002 - 432 pages
...of the two media iEigure 5.2dc this formula is known as SnelTs Law.' Refractive indices are computed as the ratio of the velocity of light in a vacuum to its velocity in the given medium. All media slow the transmission of light to some extent. and refractive...
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Seymour/Carraher's Polymer Chemistry: Sixth Edition

Charles E. Carraher Jr. - 2003 - 952 pages
...The temperature at which a simple loaded beam undergoes a definite deflection. index of refraction: The ratio of the velocity of light in a vacuum to that in a transparent polymer. infrared spectroscopy: A technique used for the charactcrization of polymers...
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