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Wave Number

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wave number [′wāv ‚nəm·bər]
(physics)
The reciprocal of the wavelength of a wave, or sometimes 2π divided by the wavelength. Also known as reciprocal wavelength.
Wave Number 

a quantity related to the wavelength λ by the ratio k = 2π/λ (the number of waves in a length of 2 π). In spectroscopy the reciprocal of the wavelength (I/λ.) is often called the wave number.
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With the characteristic impedance and wave number evaluated, the surface impedance ([Z.
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A plane screen Q containing an aperture A of width 2w is illuminated by a quasi-monochromatic source J of width 2s and circular wave number k = 2[pi]/[lambda], [P.
Issues in optical diffraction theory by Mielenz, Klaus D. / Journal of Research of the National Institute of Standards and Technology
 
 
 
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