Abstract
Abstract Our programmer for this chapter is to look at the three most important energy—momentum tensors in general relativity, namely, the energy—momentum tensors for incoherent matter or dust, a perfect fluid, and the electromagnetic field. In passing, we shall encounter a tensor formulation of Maxwell’s equations governing the electromagnetic field. Again, our treatment will not be exhaustive or complete, but will be sufficient for generating the explicit expressions for the three tensors, and these expressions will be essentially all that we require in future chapters. We shall also look more carefully at the Newtonian limit and discuss the calculation for determining the coupling constant.
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