Deduction of expressions for cross and quadratic components of radiation pressure in cases of the ideal and viscous fluid

The detailed deduction of the earlier expressions for calculation of radiation pressure in perfect fluid was made. The deduction of earlier missing corresponding expressions for a component of radiation pressure in a viscous medium caused by interaction of impinging and diffused waves was also realized. These expressions, being similar in shape with the expressions for perfect medium, will allow to use all techniques developed for the calculations of radiation pressure for perfect medium.