title: Effective geometry for light traveling in material media.
abstract: Working with electrodynamics in the geometrical optics approximation, we derive the expression representing the "effective geometry" seen by electromagnetic waves propagating in media whose physical properties depend on an external electric field. Some previous results are generalized and some special cases are recovered.
authors.affiliation: Instituto de Ciências-Escola Federal de Engenharia de Itajubá, Avenida BPS 1303 Pinheirinho, 37500-903 Itajubá, MG, Brazil. lorenci@efei.br
authors.forename: V A
authors.initials: VA
authors.lastname: De Lorenci