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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 Becke line test ： ウィキペディア英語版 Becke line test The Becke line test is a technique in optical mineralogy that helps determine the relative refractive index of two materials. It is done by lowering the stage (increasing the focal distance) of the petrographic microscope and observing which direction the light appears to "move" toward. This movement will always go into the material of higher refractive index. Typically, this is done by comparing 1) two (or more) minerals, 2) a mineral versus thin section epoxy (such as Canada Balsam which has a moderate refractive index of 1.54), and/or 3) a mineral versus an oil of known refractive index (as in oil immersion studies). They are also used for the addition of gold to gold or in gold to gold extractions. The method was developed by Friedrich Johann Karl Becke (1855–1931). ==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「Becke line test」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.