翻訳と辞書 Words near each other ・ Gravitasjon ・ Gravitation (book) ・ Gravitation (disambiguation) ・ Gravitation (film) ・ Gravitation (M. C. Escher) ・ Gravitation (manga) ・ Gravitation of the Moon ・ Gravitation water vortex power plant ・ Gravitational acceleration ・ Gravitational anomaly ・ Gravitational binding energy ・ Gravitational biology ・ Gravitational collapse ・ Gravitational compression ・ Gravitational constant ・ Gravitational coupling constant ・ Gravitational energy ・ Gravitational field ・ Gravitational Forces ・ Gravitational instability ・ Gravitational instanton ・ Gravitational interaction of antimatter ・ Gravitational keyhole ・ Gravitational lens ・ Gravitational lensing formalism ・ Gravitational metric system ・ Gravitational microlensing ・ Gravitational mirage ・ Gravitational plane wave ・ Gravitational potential Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Gravitational coupling constant ： ウィキペディア英語版 Gravitational coupling constant In physics, a gravitational coupling constant is a constant characterizing the gravitational attraction between a given pair of elementary particles. The electron mass is typically used, and the associated constant typically denoted ''α''G. It is a dimensionless quantity, with the result that its numerical value does not vary with the choice of units of measurement, only with the choice of particle. ==Definition== ''α''G is typically defined in terms of the gravitational attraction between pair of electrons. More precisely, :$\backslash alpha\_\backslash text\; =\; \backslash frac\; =\; \backslash left(\; \backslash frac\}\; \backslash right)^2\; \backslash approx\; 1.7518\; \backslash times\; 10^$ where: * ''G'' is the gravitational constant; * ''m''e is the electron rest mass; * ''c'' is the speed of light in vacuum; * ''ħ'' ("h-bar") is the reduced Planck constant; * ''m''P is the Planck mass. In natural units, where $4\backslash pi\; G=c=\backslash hbar=\backslash varepsilon\_0=1$, the expression becomes $\backslash alpha\_\backslash text\; =\; \backslash frac$. This shows that the gravitational coupling constant can be thought of as the analogue of the fine-structure constant; while the fine-structure constant measures the electromagnetic repulsion between two particles with equal charge, the magnitude of which is equal to the elementary charge, this gravitational coupling constant measures the gravitational attraction between two electrons. 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「Gravitational coupling constant」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.