  The presence of medium and external magnetic field change electromagnetic
properties of neutrino. In this article the behavior of neutrino magnetic
moment in electromagnetic field is considered. On the basis the
Bargmann-Michel-Telegdi equation for the case of models with CP invariance and
P nonconservation the new type of neutrino resonances $\nu_L \leftrightarrow
\nu_R$ in the electromagnetic field is predicted.
