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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 Irradiance ： ウィキペディア英語版 Irradiance In radiometry (measurement of electromagnetic radiation), irradiance is the radiant flux (power) ''received'' by a ''surface'' per unit area, and spectral irradiance is the irradiance of a ''surface'' per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength. The SI unit of irradiance is the watt per square metre (), while that of spectral irradiance is the watt per square metre per hertz (W·m−2·Hz−1) or the watt per square metre per metre (W·m−3)—commonly the watt per square metre per nanometre (). The CGS unit erg per square centimetre per second () is often used in astronomy. Irradiance is often called "intensity" in branches of physics other than radiometry, but in radiometry this usage leads to confusion with radiant intensity. ==Mathematical definitions== 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「Irradiance」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.