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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

wave number

The reciprocal of a wavelength (i.e., 1/λ or 2/λ, where λ is the wavelength).
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Caption: Figure 4: Top: the stationary transmission clock time [t.sup.T.sub.c] (k) (blue) and the wave number distribution [rho](k) = [[absolute value of (S(k))].sup.2] (orange, dashed, and arbitrary scale), for [V.sub.0] = 7, a = 1, b = 5, and [k.sub.0] [approximately equal to] 2.175932), with the initial state given by (18).
When the incident wave is of wave number Ai, we have derived the energy balance relation as
For the threshold Alfveen Mach number of 4.062 we obtained one instability window and instability starts at the critical dimensionless wave number of 1.944, or equivalently at [[lambda].sup.m=4.sub.cr] [congruent to] 8.0 Mm.
in which [k.sub.b] = [omega]/[[beta].sub.b] represents the shear wave number of the shear wall.
where [mathematical expression not reproducible] are spectral current density amplitudes of electric and magnetic sources, respectively; [k.sub.[rho]] = [square root of ([k.sup.2.sub.0] - [k.sup.2.sub.z])] is the radial wave number; b is the source radial distance.
The corresponding frequency for these dimensionless wave numbers is [omega] = 154.83 rad/s.
Based on the dispersion relation, it is possible to determine the travelling wave number under certain frequencies.
We will use the discrete approximation with evenly spaced [[omega].sub.k] with spacing [[DELTA].sun.[omega]] and corresponding wave numbers [[kappa].sub.k] given by the dispersion relation.
The wave number and radius update function determine how fast algorithm approaches to solution.
Comparing this with spectrum of pure FeNi [14], we can see that there is no peak in wave number 2400 [cm.sup.-1] in pure FeNi, because there is no bond between Fe and Ni atoms in this condition and no optical mode excitation is expected.