To the problem of radiation pressure in the field of progressive wave in ideal fluid

The work proves the validity of the expression for a cross component of radiation pressure in case of flat progressive or close to it wave in case of random closing. Exact expressions for radiation pressure on complex closings in a flat progressive wave in an ideal fluid were obtained for the first time. Thus, it was proved, that the cross component of radiation pressure within a constant factor is equal to the total of imaginary component coefficients at zonal harmonics in decomposition of a scattering amplitude of closing on spherical functions. Calculation for a classical particle of small wave sizes is presented.