  We derive the semiclassical equation of motion for the wave-packet of light
taking into account the Berry curvature in the momentum space. This equation
naturally describes the interplay between the orbital and spin angular momenta,
i.e., the conservation of the total angular momentum of light. This leads to
the shift of the wave-packet motion perpendicular to the gradient of the
dielectric constant, i.e., the polarization-dependent Hall effect of light. An
enhancement of this effect in the photonic crystal is also proposed.
