wave normal

wave normal

[′wāv ′nȯr·məl]
(physics)
A unit vector which is perpendicular to an equiphase surface of a wave, and has its positive direction on the same side of the surface as the direction of propagation.
One of a family of curves which are everywhere perpendicular to the equiphase surfaces of a wave.
References in periodicals archive ?
which are directed along of the wave normal [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII].
ij] is Kronecker delta, k is wave number and v is phase speed, and (sin[theta], cos[theta]) are projections of the wave normal on to x-z plane.
In turn, at comparting (23) and (6), we may argue that the vector of wave normal [?
At comparing of (29) and (30), we may argue that vector of wave normal [?