  We study the standard spectral line radiative transfer equation for media
consisting of resonant atoms and non-resonant components (the dust grains and
the atoms without considered spectral transition). Our goal is to study the
intensity and polarization of the resonance radiation emerging from
semi-infinite atmosphere. Using the known technique of resolvent matrices, we
obtain the exact solution of vectorial radiative transfer equation for various
sources of non-polarized radiation in semi-infinite atmosphere. Homogeneous,
linear increasing and exponentially decreasing sources are considered. Recall,
that homogeneous sources correspond to the isothermal atmosphere and the
exponential ones correspond to the incident radiation with different angles of
inclination.
