翻訳と辞書 Words near each other ・ Nulga ・ Nulgupjisin ・ Nulhegan Band of the Coosuk Abenaki Nation ・ Nuli ・ Nuli Bolagh ・ Nuliajuk ・ Nulji of Silla ・ Nulka ・ Nulkaba, New South Wales ・ Null ・ Null (comics) ・ Null (computing) ・ Null (Foetus EP) ・ Null (Intronaut EP) ・ Null (mathematics) ・ Null (physics) ・ Null (radio) ・ Null (SQL) ・ Null allele ・ Null allomorph ・ Null and Void Ordinance ・ Null Bazaar ・ Null cell ・ Null character ・ Null cipher ・ Null coalescing operator ・ Null corrector ・ Null cycle ・ Null Device ・ Null device 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 Null (physics) ： ウィキペディア英語版 Null (physics) In physics a null is a point in a field where the field quantity is zero as the result of two or more opposing quantities completely cancelling each other. The field may be scalar, vector or tensor in nature. Common situations where nulls arise are in the polar patterns of microphones and antennae, and nulls caused by reflections of waves. ==Microphones== A common polar pattern for microphones is the cardioid. This has a single direction in which the microphone does not respond to impinging sound waves. Highly directional (shotgun) microphones have more complex polar patterns. These microphones have a large, narrow lobe in the main direction of sound reception but also a smaller lobe in the opposite direction and usually also several other smaller lobes. This pattern is achieved by wave cancellation inside the body of the microphone. Between each of these lobes is a null direction where no sound at all is detected. 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「Null (physics)」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.