Ristmagnetrežiim on elektromagnetlaine olek, kus magnetväljal puudub levimissuunas komponent, ja kuna magnetväli on laine levimissuunaga puhtalt risti, peab elektriväli laine levimiseks sisaldama pikisuunalist komponenti.
A transverse magnetic (TM) mode is an electromagnetic wave state where the magnetic field has no component in the direction of propagation. Because the magnetic field is purely perpendicular to the wave's travel direction, the electric field must contain a longitudinal component to propagate the wave.