wave-number

wave number

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

Origin:
1900–05

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Collins
World English Dictionary
wave number
 
n
physics ν, σ the reciprocal of the wavelength of a wave

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
wave number  
The number of wave cycles per unit distance for a wave of a given wavelength.
The American Heritage® Science Dictionary
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