Gravitational theory 0 electrodynamics

This means that the general rule is that capacitances are not constants, the exception being for a restricted domain and a limited class of materials. Such exceptions are met in electrodynamics where nonlinear permittivities are recognized for some materials (Jonscher 1996), but not yet in gravitation theories. Note that this last assertion must be tempered by the attempts of some astrophysicist to remove the constancy of the gravitational constant in order to decrease or suppress the recourse to dark matter for modeling the composition of the universe (Magueijo 2003 Moffat 2008). 

The following case studies are representatives of the phenomenon of influence through the main domains in which it is acknowledged by the classical theory electrodynamics and gravitation. The... 

To consider magnetic flux density components of IAIV, Q must have the units of weber and R, the scalar curvature, must have units of inverse square meters. In the flat spacetime limit, R 0, so it is clear that the non-Abelian part of the field tensor, Eq. (6), vanishes in special relativity. The complete field tensor F vanishes [1] in flat spacetime because the curvature tensor vanishes. These considerations refute the Maxwell-Heaviside theory, which is developed in flat spacetime, and show that 0(3) electrodynamics is a theory of conformally curved spacetime. Most generally, the Sachs theory is a closed field theory that, in principle, unifies all four fields gravitational, electromagnetic, weak, and strong. 

We note several very general formulations of the problem. A striking example of this is Ya.B. s 1967 paper [14 ], in which he considers the possibility of a theory in which the bare photon field is absent, while the observed electromagnetic field is created entirely by quantum fluctuations of a vacuum. This bold idea, which extends to electrodynamics an earlier idea about gravitational interaction (in part, under the influence of Ya.B. s papers on the cosmological constant), has not yet been either proved or disproved. However, both ideas have elicited lively discussion in the scientific literature. 

Is the gravitational constant a constant According to Newton and Einstein, the gravitational permittivity HAtzG is a constant. If one has confidence in the Formal Graph approach, comparison with electrodynamics, where the electric permittivity e may vary depending on the medium, leads to ranoval of this constancy for some media. This is still a subject of research within the framework of a theory that would unify all forces in physics. 

Gravitational constant. The Formal Graph theory outlines the fact that the constancy of the gravitational constant G (leading to a linear capacitance) is a property of free space (vacuum) but that in nonlinear media this constitutive reduced property must be replaced by a more general one which is not a constant anymore. As in the case of electrodynamics for the vacuum permittivity q replaced by the permittivity e. 

The second volume of the Landau-Lifshitz series on theoretical physics continues directly after volume I and covers the classical theory of fields. It starts with an introduction of Einstein s principle of relativity and a discussion of the special theory of relativity for mechanics. It follows a rather complete presentation of classical electrodynamics including radiation phenomena and scattering of waves of different energy. It concludes with an introduction of gravitational fields, the theory of general relativity and classical relativistic cosmology. 

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