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wave number

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noun
  1. the number of waves in one centimeter of light in a given wavelength; the reciprocal of the wavelength.
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Origin of wave number

First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for wave number

wave number

noun
  1. physics the reciprocal of the wavelength of a waveSymbol: ν, σ
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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

wave number in Science

wave number

  1. The number of wave cycles per unit distance for a wave of a given wavelength.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.