[請益] Griffiths電磁
在182頁的地方提到對於homogeneous dielectric
對D取散度是自由電荷密度,而對D取旋度則為零
然後作者接下去就說這時候D可以表示成ε0乘以在無介電質時同樣的電場
這邊一整個很突然,不太能理解上面和下面的關聯性在哪...
可以請強者解釋一下嗎,謝謝!!
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