  Motion of test particles in the gravitational field associated with an
electromagnetic plane wave is investigated. The interaction with the radiation
field is modeled by a force term {\it \`a la} Poynting-Robertson entering the
equations of motion given by the 4-momentum density of radiation observed in
the particle's rest frame with a multiplicative constant factor expressing the
strength of the interaction itself. Explicit analytical solutions are obtained.
Scattering of fields by the electromagnetic wave, i.e., scalar (spin 0),
massless spin $\frac12$ and electromagnetic (spin 1) fields, is studied too.
