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wave·num·ber (σ),

The number of waves per centimeter (cm-1), used to simplify the large and unwieldy numbers heretofore used to designate frequency.
See also: wave number.
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As resulted from the plots of the backscattered signal magnitude as a function of the wavenumber (frequency) of the incident EM wave, as the roughness of the fractal surface increases (i.
Table 2 lists the numerical results of the SBM and the BEM with different wavenumbers (k=1, k = 10, and k = 20).
Where R([omega]) is the reflectance and is the phase change between the incident and reflected signals for a particular wavenumber [omega].
The CEC of the clays is shown in Table 3: as CEC decreases the absorption peaks shift to higher wavenumbers.
For the sake of simplicity, we report in Table 2 the calculated wavenumbers for the C=O, C=N, and N-H stretches, involving in hydrogen bonding.
This was indicated by ATR-FTIR findings of untreated skin where its wavenumber corresponding to O-H and/or N-H at 3347.
Since the absorption is based on the vibration mode of atoms and very specific, therefore each peak at different wavenumber represents only to specific functional group (Alexander and Bell, 1972).
1] intervals in the wavenumber range of 7800 to 450 [cm.