refractive index

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refractive index

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

refractive index

(General Physics) physics a measure of the extent to which radiation is refracted on passing through the interface between two media. It is the ratio of the sine of the angle of incidence to the sine of the angle of refraction, which can be shown to be equal to the ratio of the phase speed in the first medium to that in the second. In the case of electromagnetic radiation, esp light, it is usual to give values of the absolute refractive index of a medium, that is for radiation entering the medium from free space. Symbol: ν or μ

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

in′dex of refrac′tion

a number indicating the speed of light in a given medium, usu. as the ratio of the speed of light in a vacuum or in air to that in the given medium.

[1820–30]

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Noun

refractive index - the ratio of the velocity of light in a vacuum to that in a medium

index of refraction

ratio - the relative magnitudes of two quantities (usually expressed as a quotient)

Translations

Brechungsindex

indice di rifrazione

refractive index

n → Brechzahl f, → Brechungsindex m

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

References in periodicals archive ?

The patient uses eye drops containing nanoparticles that penetrate the patterns and change the refraction index to correct their vision.

Nanoparticle Eye Drops Improve Vision

According to coupled-mode theory, cladding modes are characterized by their effective refraction index and propagation constant.

Ultrashort Long-Period Fiber Gratings Inscribed on a Single-Mode Fiber for Torsion Sensing Applications

Namely, temporal and spatial fluctuations that occur are consequence of the variations of refraction index (caused by fog, rain haze), which manifest as irradiation fluctuations of received FSO signal [3]--[5].

On the transmission of colour image over double generalized gamma FSO channel

It was stated through theoretical and experimental results that anisotropic chiral media can have a negative refraction index like isotropic media with both negative permittivity and permeability.

Propagation in Diagonal Anisotropic Chirowaveguides

Recently, the fishnet structure has attracted a great potential approved in the studies where the negative refraction index for first time was displayed in a 3D optical MTM [4, 5].

Wideband Negative Permittivity and Double Negative Fishnet-Mushroom-Like Metamaterial in X-Band Waveguide

The darkening of the soil can be explained, in optical terms, by the variation in the refraction index of the dry soil and wet soil.

Use of digital images to estimate soil moisture/Uso de imagens digitais para estimar a umidade do solo

In the simplest optical systems that are used to guide light from one point in the system to the other, passing through materials or mediums with different optical properties it is essential to know the materials refraction index. By knowing these values in addition to source light incidence angle it becomes possible to predict direction of the outgoing light (or guide the light in direction that is required) after it passes the boundary between two different mediums.

Design and implementation of uniform light guide based, force and deflection measurement device

Here, however, we shall be assuming that the fluctuations of refraction index are smooth, which means that the streamlines are smooth, as well.

Implications of the theory of turbulent mixing for wave propagation in media with fluctuating coefficient of refraction/Turbulentse segunemise teooria rakendusi lainelevile muutuva murdumisnaitajaga keskkonnas

It turned out that when a sphere made of a material with high refraction index interacts with light, the result of this interaction to a large extent resembles the above-described plasmon resonance in metals with one (but very important) exception: a wide range of dielectric materials -- as distinct from metals -- have weak damping at the optical frequencies.

Photon-Based Computer? 'Magic' Sphere Created

In 2009, Leonhardt proposed that perfect imaging can be achieved without a negative refraction index [3].

Can Maxwell's Fish Eye Lens Really Give Perfect Imaging? Part III. A Careful Reconsideration of the "Evidence for Subwavelength Imaging with Positive Refraction"

Among specific topics are ultrasonic milling and dispersing technology for nanoparticles, preparing polymer nanocomposites with enhanced antimicrobial properties, the effect of anodization time of the properties of titania nanotube humidity sensors, conductance properties of multilayered silver-mean and period-doubling graphene structures, and the nonlinear absorption coefficient and relative refraction index change for an asymmetrical double delta-doped quantum well in gallium arsenide with a Schottky barrier potential.