Engineering Physics Annotation << Back THE SIVUKHIN PROBLEM AND ANOMALOUS OPTICAL MEDIA B.A. VEKLENKO It is shown that the Sivukhin problem dealing with existence of homogeneous isotropic media not possessing the space dispersion and both the permittivity and permeability in which at any frequency simultaneously possess negative values has only negative solution. The existence of such media contradicts to the causality principle. It is shown that the Maxwell equations permit of the existence of another nonconventional linear optical media which properties cannot be described by fi nite permittivity and permeability if even they both depend on frequency and wave number. The electromagnetic waves in such anomalous media at any frequencies can obtain group and phase velocities directed in opposite directions. In such a case in such media the negative refraction of light takes place. Key words: phase and group velocities, left handed media, negative refracted index. Contacts: E-mail: veklenkoba@yandex.ru Pp. 15-22.