CHINESE JOURNAL OF PHYSICS, cilt.41, sa.5, ss.465-474, 2003 (SCI-Expanded)
We solve the photon equation and the Maxwell equations separately and show that the Maxwell equations can be obtained as the zero mass limit of the DKP equation in curved spacetimes. Finally, by introducing a curved 6 x 6 representation of the matrices in Robertson-Walker spacetime, we show that the Maxwell equations can be written in a Dirac-like equation form.