Department of Physics2024-11-0920201300-010110.3906/fiz-2002-182-s2.0-85090426892https://hdl.handle.net/20.500.14288/504A nonminimal coupling of Weyl curvatures to electromagnetic fields is considered in Brans-Dicke-Maxwell theory. The gravitational field equations are formulated in a Riemannian spacetime where the spacetime torsion is constrained to zero by the method of Lagrange multipliers in the language of exterior differential forms. The significance and ramifications of nonminimal couplings to gravity are examined in a pp-wave spacetime.pdfPhysics, multidisciplinaryJournal Article1303-6122https://doi.org/10.3906/fiz-2002-18543343200004N/ANOIR02341