| 单词 | index of refraction |
| 释义 | index of refractionnoun Optics.a number indicating the speed of light in a given medium as either the ratio of the speed of light in a vacuum to that in the given medium (absolute index of refraction ) or the ratio of the speed of light in a specified medium to that in the given medium (relative index of refraction ).Symbol: n Also called index, refractive index. Origin of index of refractionFirst recorded in 1820–30 Words nearby index of refractionindex-link, index-linked, index mineral, index number, Index of Industrial Production, index of refraction, index patient, index plate, index set, India, India chintz Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for index of refraction
British Dictionary definitions for index of refractionindex of refraction nounanother name for refractive index 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 Scientific definitions for index of refractionindex of refraction A measure of the extent to which a substance slows down light waves passing through it. The index of refraction of a substance is equal to the ratio of the velocity of light in a vacuum to its speed in that substance. Its value determines the extent to which light is refracted when entering or leaving the substance. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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