2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39818The T-reversal-violating optical gyrotropy is discussed. An expression for dielectric permittivity describing T-reversal-violating phenomena in a medium exposed to external electric and magnetic fields is presented. Optical phenomena of birefringence and polarization plane rotation of photon in a medium exposed to external electric and magnetic fields are considered.Latex, 14 pages with 2 Postscript figureHigh Energy Physics - Phenomenologytext