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Reflection and refraction phenomena of a plane dilatational wave striking obliquely at a plane interface between a uniform elastic half-space and a swelling porous elastic half-space has been studies.The swelling porous half-space consists of solid,liquid(viscous)and gas(inviscid)constituents.The equations giving the amplitude ratios and the expressions for the partition of incident energy among various reflected/refracted waves have been presented.Numerical computations have been performed for a specific model.