2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/147460Key words : The Maxwell equations, band structure calculations, Kohn-Korringa-Rostocker method, and multiple-scattering theory for photons. For those who are interested in how to prepare perfect mirror from a purely transparent material. Some recent results of ours are summarized and presented.(to appear in: ``Confined Electrons and Photons : New Physics and Applications", ed. E. Burstein and C. Weisbuch, Plenum Press, New York (1993)), (one reference updated) Latex 6pp, PRA-HEP 93/13Condensed Mattertext