Physics of Gravitational Fields

After having defined the most important physical properties and the three main types of gravitational field and after having examined dynamics of a moving system into a gravitational field, we prove the theoretical cogency of a gravitational perturbation that propagates in the gravitational field and is caused by the free fall of a massive body. This gravitational perturbation is due to the real gravitational field where motion happens and it isn't related to traces of primordial gravitational waves recently detected in the cosmic microwave background radiation in the order of BICEP2 experiment.