refractive index

noun Optics.

index of refraction.

Origin of refractive index

First recorded in 1830–40

Words nearby refractive index

refractile, refracting telescope, refraction, refractionist, refractive, refractive index, refractive keratotomy, refractivity, refractometer, refractometry, refractor

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for refractive index

refractive index

noun

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 spaceSymbol: ν, μ

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for refractive index

refractive index

n.

The ratio of the speed of light in air or in a vacuum to the speed of light in another medium.

单词	refractive index
释义	refractive index noun Optics. index of refraction. Origin of refractive index First recorded in 1830–40 Words nearby refractive index refractile, refracting telescope, refraction, refractionist, refractive, refractive index, refractive keratotomy, refractivity, refractometer, refractometry, refractor Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for refractive index refractive index noun 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 spaceSymbol: ν, μ Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for refractive index refractive index n. The ratio of the speed of light in air or in a vacuum to the speed of light in another medium. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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