Many-body optics. V. Virtual-mode theory, and phenomenological binding energies in the complex-dielectric-constant approximation

For Pt. IV see ibid., vol. 3, no. 6, p. 726 (1970). It is shown that the one-component virtual-mode theory of the previous paper, which is a well-defined translationally invariant many-body optical theory of the molecular fluid, can be extended without difficulty to the two-component fluid. It is inferred that the theory of both 'virtual' and 'real' electromagnetic modes developed previously is applicable to fluids with any number of components.