ELECTROMAGNETIC-WAVES IN-SPACE WITH 3-DIMENSIONAL TIME

Properties of plane waves in six-dimensional Minkowski space-time with equal number of space and time co-ordinates are considered. In the x- subspace the wave is characterized by three orthogonal one-to-the-othe r vector fields two of which are transversal and the third is longitud inal with respect to the direction of the wave motion. The energy of t ransverse and longitudinal field components is, respectively, positive and negative; however, due to the causality principle permitting the development along all time axes only from the past to the future, the total wave energy is always positive, which prevents a spontaneous cre ation of waves from vacuum and exotic processes in which the final mas s exceeds the initial one.