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It is shown that the scalar representation of electromagnetic fields introduced in an earlier paper leads to a new model for energy transport. The energy may be considered to be carried by two mutually incoherent scalar waves, each of which arises from contributions of circularly polarized components of the same helicity. In a monochromatic field the energy density and the energy flow of each of these two partial waves are time-independent and the energy flow is at every point of the field in the direction of the normal to the surface of constant phase of the wave. Mathematically, the two partial waves are represented by `analytic signals' (containing spectral components of only positive or negative frequencies) into which the complex potential of the field may be decomposed.
E. Wolf (Tue,) studied this question.
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