2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/97658A new method is proposed to calculate the polarization vector of a molecule in a monochromatic external field in the anomalous-despersion domain. The method takes into account the instantaneous switching of the field. A simple modification of the method allows one to consider a more general switching procedure. As an illustration of the method Fourier components of the polarization vector of the LiH molecule in the anomalous -dispersion domain is calculated.2 pages, latex, no figuresQuantum Physicstext