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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 Planck volume ： ウィキペディア英語版 Planck length In physics, the Planck length, denoted , is a unit of length, equal to metres. It is a base unit in the system of Planck units, developed by physicist Max Planck. The Planck length can be defined from three fundamental physical constants: the speed of light in a vacuum, the Planck constant, and the gravitational constant. ==Value== The Planck length is defined as :$\backslash ell\_\backslash mathrm\; =\backslash sqrt\backslash frac\; \backslash approx\; 1.616\backslash ;199\; (97)\; \backslash times\; 10^\backslash \; \backslash mathrm$ where $c$ is the speed of light in a vacuum, is the gravitational constant, and is the reduced Planck constant. The two digits enclosed by parentheses are the estimated standard error associated with the reported numerical value.〔John Baez, (The Planck Length )〕〔NIST, "(Planck length )", (NIST's published ) CODATA constants〕 The Planck length is about 10−20 times the diameter of a proton. 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「Planck length」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.