WKBJ Approximation


WKBJ Approximation : A method for approximate solution of wave propagation through an inhomogeneous medium, in which the velocity variations are relatively weak and occur over distances large compared with the wavelengths of interest. This method is named after Gregor Wentzel, Hendrik Kramers, Leon Brillouin, and Harlod Jeffreys. See: Aki and Richards (2002 or 2009, Box 9.6, p. 434-437) and the biographies of Wentzel, Kramers, Brillouin, and Jeffreys in Howell (2003)
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