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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 Phosphoroscope ： ウィキペディア英語版 Phosphoroscope A phosphoroscope is piece of experimental equipment devised in 1857 by physicist A. E. Becquerel to measure how long it takes a phosphorescent material to stop glowing after it has been excited.〔(【引用サイトリンク】)'' Phosphoroscope">publisher=University of Aberdeen )〕 It consists of two rotating disks with holes in them. The holes are placed on each disk at equal angled radial lines and a given distance from the centre but they do not align with each other. A sample of phosphorescent material is placed in between the two disks. Light coming in through a hole in one of the discs excites the phosphorescent material which then emits light for a short amount of time. The disks are then rotated and by changing their speed the length of time the material glows can be determined. == 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「Phosphoroscope」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.