  Dark bubble cosmology is an alternative paradigm to compactification, which
can circumvent issues of moduli stabilization and scale separation. In this
paper we investigate how electromagnetic fields can be incorporated in this
framework. Worldvolume fields backreact on the ambient universe in which the
bubble expands, which in turn affects the energy-momentum distribution and the
effective gravity induced on the brane. We compute these effects, showing that
the resulting four-dimensional cosmology consistently includes electromagnetic
waves.
