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坎德拉
释义
坎德拉
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工学
〔SI基本单位〕
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candela
坎德拉
国际单位制(SI)中的沿指定方向发光强度单位。符号cd。当频率为540×1012赫兹的单色辐射的光视效能以单位lm·W-1即cd·sr·W-1或cd·sr·kg-1·m-2·s3表示时,将其固定数值取为683来定义坎德拉,其中千克、米、秒分别用h、c和ΔνCs来定义。
Physics
>光学>光度学和色度学>释义
candela
坎德拉
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