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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Bondi mass ： ウィキペディア英語版 Mass in general relativity The concept of mass in general relativity (GR) is more complex than the concept of mass in special relativity. In fact, general relativity does not offer a single definition of the term mass, but offers several different definitions that are applicable under different circumstances. Under some circumstances, the mass of a system in general relativity may not even be defined. == Review of mass in special relativity == In special relativity, the invariant mass (''hereafter simply "mass"'') of an isolated system can be defined in terms of the energy and momentum of the system by the relativistic energy–momentum equation: :$m\; =\; \backslash frac$ Where E is the total energy of the system, p is the total momentum of the system and c is the speed of light. Concisely, in fundamental units where $c\; =\; 1$, the mass of a system in special relativity is the norm of its energy–momentum four vector; otherwise, it is $mc$. 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「Mass in general relativity」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.