Kahil M.E.October University for Modern Sciences and ArtsGizaEgypt; Egyptian Relativity GroupCairoEgypt2020-01-092020-01-0920172022893https://doi.org/10.1134/S0202289317010066PubMed ID :https://t.ly/7OGMJScopusThe problem of motion of different test particles, charged and spinning objects with a constant spin tensor in different versions of the bimetric theory of gravity is considered by deriving their corresponding path and path deviation equations using a modified Bazanski Lagrangian. Such a Lagrangian, as in the framework of Riemannian geometry, has a capability to obtain path and path deviations of any object simultaneously. This method enables us to derive the path and path deviation equations of different objects orbiting in very strong gravitational fields. 2017, Pleiades Publishing, Ltd.EnglishArticlehttps://doi.org/10.1134/S0202289317010066PubMed ID :