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Line 31: Tesla allegedly said that his theory explained [[gravitation]] as a mixture of [[transverse wave\|transverse]] and [[longitudinal wave\|longitudinal]] electromagnetic waves. For comparison, in the language of mainstream physics, [[electromagnetic wave]]s as treated in [[Maxwell's theory of electromagnetism]] are said to be ''spin-one'' and ''purely transverse'', while in [[general relativity]], [[gravitational wave]]s are said to be ''spin-two'' and ''purely transverse''. Thus, in Maxwell's theory there are no longitudinal electromagnetic waves, while in general relativity, despite some useful ~~formal~~conceptual similarities, the gravitational ~~radiation~~field effect (of a mass deforming spacetime) is distinct from electromagnetic radiation. Also, while in Maxwell's theory, the effects of the electromagnetic field on charged test particles is treated by the [[Lorentz force law]], in general relativity, the effects of the gravitational field on test particles is treated very differently: the kinematical history of a test particle is represented by a [[timelike]] [[geodesic]] in a [[Lorentzian manifold]], while, roughly speaking, the kinematical history of a photon is represented by a [[null geodesic]]. ==Tesla's views on special and general relativity==

Dynamic theory of gravity: Difference between revisions