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单词 inverse-square law
释义
inverse-square law

Physics
  • A law in which the magnitude of a physical quantity is proportional to the reciprocal of the square of the distance from the source of that property. Newton’s law of gravitation and Coulomb’s law are both examples. The inverse-square law has very special mathematical and physical properties (see e.g. Fock degeneracy) that other inverse powers of the distance do not have.


Astronomy
  • A law that describes how the strength of a force (e.g. gravitation) or a flow of energy (e.g. light) weakens with distance from the source. According to the inverse-square law, the magnitude of a given quantity is inversely proportional to the square of the distance from the source. For example, if an object’s distance were doubled, the strength of the light or gravity from it would fall by four times; if its distance were tripled, the strength of its light or gravity would be nine times less.


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