In the general theory of relativity what causes space-time to be modified?
Physical theories modified by general relativity an electromagnetic field on a charged object is then modified to where "q" is the charge on the object, "m" is the rest mass of the object and "P" is the four-momentum of the charged object. Maxwell's equations in flat spacetime are recovered in rectangular coordinates by reverting the covariant derivatives to partial derivatives. For Maxwell's equations in flat spacetime in curvilinear coordinates see or Physical theories modified by general relativity "This article will use the Einstein summation convention." The theory of general relativity required the adaptation of existing theories of physical, electromagnetic, and quantum effects to account for non-Euclidean
Physical theories modified by general relativity Physical theories modified by general relativity "This article will use the Einstein summation convention." The theory of general relativity required the adaptation of existing theories of physical, electromagnetic, and quantum effects to account for non-Euclidean geometries. These physical theories modified by general relativity are described below. Classical mechanics and special relativity are lumped together here because special relativity is in many ways intermediate between general relativity and classical mechanics, and shares many attributes with classical mechanics. In the following discussion, the mathematics of general relativity is used heavily. Also, under the principle of minimal coupling, the physical equations of special