Gravitational field

  • Gravitational Field
  • Pertaining to the measurement, strength, size, etc. of the Earth's gravitational field.
Abstract from DBPedia
    In physics, a gravitational field is a model used to explain the influences that a massive body extends into the space around itself, producing a force on another massive body. Thus, a gravitational field is used to explain gravitational phenomena, and is measured in newtons per kilogram (N/kg). Equivalently, it is measured in meters per second squared (m/s2). In its original concept, gravity was a force between point masses. Following Isaac Newton, Pierre-Simon Laplace attempted to model gravity as some kind of radiation field or fluid, and since the 19th century, explanations for gravity have usually been taught in terms of a field model, rather than a point attraction. In a field model, rather than two particles attracting each other, the particles distort spacetime via their mass, and this distortion is what is perceived and measured as a "force". In such a model one states that matter moves in certain ways in response to the curvature of spacetime, and that there is either no gravitational force, or that gravity is a fictitious force. Gravity is distinguished from other forces by its obedience to the equivalence principle.

    重力場(じゅうりょくば、英語: gravitational field)とは、万有引力(重力)が作用する時空中に存在する場のこと。 重力を記述する手法としては、ニュートンの重力理論に基づく手法と、アインシュタインによる一般相対性理論に基づく手法がある。


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