(redirected from Circular wavenumber)

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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1, P = (x, y, z) is the point of observation (z [greater than or equal to] 0), Q = ([xi], [eta], 0) is a point on A, QP is the distance between them, n is the aperture normal pointing in the direction of the positive z-axis, and k = 2[pi]/[lambda] is the circular wavenumber of monochromatic light with wavelength [lambda].