5.19  circularly polarized sound wave. Transverse wave in an elastic medium in which the displacement vector at any point rotates about a point with constant angular velocity and constant magnitude.

Annotation              A circularly polarized wave is equivalent to two superposed plane-polarized waves of sinusoidal form in which the displacements have the same amplitude, lie in perpendicular planes, and are displaced in phase by π/2 radians.

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