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Several measures of light are commonly known as intensity: *Radiant intensity, a radiometric quantity measured in watts per steradian (W/sr) *Luminous intensity, a photometric quantity measured in lumens per steradian (lm/sr), or ''candela'' (cd) *Irradiance, a radiometric quantity, measured in watts per meter squared (W/m2) * *Intensity (physics), the name for irradiance used in other branches of physics (W/m2) *Radiance, commonly called "intensity" in astronomy and astrophysics (W·sr−1·m−2) ==See also== *Brightness, the subjective perception elicited by the luminance of a source *Luminance, the photometric equivalent of radiance (lm·sr−1·m−2) *Photometry (optics), measurement of light, in terms of its perceived brightness to the human eye *Radiometry, measurement of light, in absolute power units 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「Light intensity」の詳細全文を読む スポンサード リンク
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