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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 particle ： ウィキペディア英語版 Planck particle A Planck particle, named after physicist Max Planck, is a hypothetical particle defined as a tiny black hole whose Compton wavelength is equal to its Schwarzschild radius.〔Michel M. Deza; Elena Deza. ''(Encyclopedia of Distances )''. Springer; 1 June 2009. ISBN 978-3-642-00233-5. p. (433 ).〕 Its mass is thus approximately the Planck mass, and its Compton wavelength and Schwarzschild radius are about the Planck length.〔("Light element synthesis in Planck fireballs" - SpringerLink )〕 Planck particles are sometimes used as an exercise to define the Planck mass and Planck length.〔B. Roy Frieden; Robert A. Gatenby. ''(Exploratory data analysis using Fisher information )''. Springer; 2007. ISBN 978-1-84628-506-6. p. (163 ).〕 They play a role in some models of the evolution of the universe during the Planck epoch.〔 p. (424 )〕 Compared to a proton, for example, the Planck particle would be extremely small (its radius being equal to the Planck length, which is about 10−20 times the proton's radius) and heavy (the Planck mass being 1019 times the proton's mass). It is thought that such a particle would vanish in Hawking radiation. == Derivation == While opinions vary as to its proper definition, the most common definition of a Planck particle is a particle whose Compton wavelength is equal to its Schwarzschild radius. This sets the relationship: : $\backslash lambda\; =\; \backslash frac\; =\; \backslash frac$ Thus making the mass of such a particle: : $m\; =\; \backslash sqrt\}$ This mass will be $\backslash sqrt$ times larger than the Planck mass, making a Planck particle 1.772 times more massive than the Planck unit mass. Its radius will be the Compton wavelength: : $r\; =\; \backslash frac\; =\; \backslash sqrt\}$ 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 particle」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.