Ellipticity of Motion for Particle in Field of Inhomogeneous Plane Wave

Locus of mation for particle in the field of inhomogeneous plane wave will be elliptic when the homogeneous plane wave incidents upon the interface of liquid -thermoviscoelastic and generates the inhomogeneous plane waves.Calculations show:for the particles which are located in the fields of longitudinal and transversal wave,the ellipticity will be 1 if the incidence is much smaller than their critical angle;the ellipticity will be the smallest if the incidence is much bigger than their critical angles;the ellipticity will change much if the incidence is near their critical angles.For the particles which are located in the field of entropic or reflective wave,the ellipticity of the former will diminish linearly approximately versus angle of incidence;the ellipticity of the latter is totally 1.The ellipticity will change periodically versus depth of interface under the incidence of Rayleigh angle.The ellipticity will be 1 if the depths are the integer times of wavelength of Rayleigh wave and the ellipticity will be the smallest if the depths are the odd times of half wavelength of Rayleigh wave.