Negative Refraction, Light Pressure and Attraction, Equation E=mc2 and Wave-particle Dualism

The process of mass transfer from the emitter to the receiver is considered for different connection between energy and momentum. Shown, in particular, that in the case when the energy is transferred by radiation, this relationship has the form E = mv(ph)v(gr), where v(ph) - phase velocity, and v(gr) -group velocity. From this equation immediately shows that in media with negative refraction radiation transfers the mass not from the transmitter to receiver, but rather from the receiver to the transmitter. It follows, that the mass transferred from the transmitter to the receiver is determined not only by transferred energy, but also by transferred linear momentum, which may be associated with energy in different ways. Thus, the well-known relation E = mc(2) is a special case of E = mv(ph)v(gr).