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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 Umov effect ： ウィキペディア英語版 Umov effect The Umov effect, also known as Umov's law, is a relationship between the albedo of an astronomical object, and the degree of polarization of light reflecting off it. The effect was discovered by the Russian physicist Nikolay Umov in 1905, and can be observed for celestial objects such as the surface of the Moon and the asteroids. The ''degree of linear polarization'' of light ''P'' is defined by :$P\; =\; \backslash frac\backslash \; ,$ where $I\_\backslash perp$ and $I\_\backslash |$ are the intensities of light in the directions perpendicular and parallel to the plane of a polarizer aligned in the plane of reflection. Values of ''P'' are zero for unpolarized light, and ±1 for linearly polarized light. Umov's law states :$P\; \backslash propto\; \backslash frac\backslash \; ,$ where α is the albedo of the object. Thus, highly reflective objects tend to reflect mostly unpolarized light, and dimly reflective objects tend to reflect polarized light. The law is only valid for large phase angles (angles between the incident light and the reflected light). ==References== 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「Umov effect」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.