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能流密度是在一定空間範圍內,組織面積(如平方米)所能取得的或組織重量(如公斤)能源所能產生的某種能源的能量或功率.在電磁學中,能流密度指組織時間內通過與傳播方向垂直的組織面積的能量. 我想你看到這個定義用該知道怎麼算了吧.
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