翻訳と辞書 Words near each other ・ Point Robinson Light ・ Point Rock, New York ・ Point Sal State Beach ・ Point Salubrious Historic District ・ Point Samson, Western Australia ・ Point San Luis Light ・ Point San Pablo Yacht Harbor ・ Point San Quentin ・ Point Sebago Resort ・ Point set registration ・ Point set triangulation ・ Point shaving ・ Point Sherman Light ・ Point shooting ・ Point Smellie ・ Point source ・ Point source (disambiguation) ・ Point source pollution ・ Point South, South Carolina ・ Point Southworth ・ Point spread function ・ Point Stadium ・ Point State Park ・ Point Stephens Light ・ Point Street Bridge ・ Point Sturt ・ Point Sur Lighthouse ・ Point Sur State Historic Park ・ Point Sur State Marine Reserve and Marine Conservation Area ・ Point system (driving) 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 Point source ： ウィキペディア英語版 Point source A point source is a single identifiable ''localised'' source of something. A point source has negligible extent, distinguishing it from other source geometries. Sources are called point sources because in mathematical modeling, these sources can usually be approximated as a mathematical point to simplify analysis. The actual source need not be physically small, if its size is negligible relative to other length scales in the problem. For example, in astronomy, stars are routinely treated as point sources, even though they are in actuality much larger than the Earth. In three dimensions, the density of something leaving a point source decreases in proportion to the inverse square of the distance from the source, if the distribution is isotropic, and there is no absorption or other loss. ==Mathematics== In mathematics, a point source is a singularity from which flux or flow is emanating. Although singularities such as this do not exist in the observable universe, mathematical point sources are often used as approximations to reality in physics and other fields. 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「Point source」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.