2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/143833The neutrino spin flip radiative conversion processes nu_L -> nu_R + gamma^* and nu_L + gamma^* -> nu_R in medium are considered. It is shown in part that an analysis of the so-called spin light of neutrino without a complete taking account of both the neutrino and the photon dispersion in medium is physically inconsistent.4 pages, LaTeX, 1 eps figure, based on the talk presented at the 13th Lomonosov Conference on Elementary Particle Physics, Moscow State University, Moscow, Russia, August 23-29, 2007, submitted to the ProceedingsHigh Energy Physics - Phenomenologytext