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Scalar theories of gravitation are field theories of gravitation in which the gravitational field is described using a scalar field, which is required to satisfy some field equation. ''Note:'' This article focuses on relativistic classical field theories of gravitation. The best known relativistic classical field theory of gravitation, general relativity, is a tensor theory, in which the gravitational interaction is described using a tensor field. == Newtonian gravity == The prototypical scalar theory of gravitation is Newtonian gravitation. In this theory, the gravitational interaction is completely described by the potential , which is required to satisfy the Poisson equation (with the mass density acting as the source of the field). To wit: , where * ''G'' is the gravitational constant and * is the mass density. This field theory formulation leads directly to the familiar law of universal gravitation, . 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Scalar theories of gravitation」の詳細全文を読む スポンサード リンク
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