Considerations of the symmetry of the media, light and axial vector of the magnetic field forbid QMR in non-magnetic or magnetically disordered media.
kənsˌɪdɚɹˈeɪʃənz ʌvðə sˈɪmətɹi ʌvðə mˈiːdiːə, lˈaɪt ænd ˈæksɪəl vˈɛktɚɹ ʌvðə mæɡnˈɛɾɪk fˈiːld fɚbˈɪd kjˌuːˌɛmˈɑːɹ ɪn nˈɑːnmæɡnˈɛɾɪk ɔːɹ mæɡnˈɛɾɪkli dɪsˈoːɹdɚd mˈiːdiːə.