同济大学：《大学物理》课程教学资源（电子教案，英文版）第十九章 电磁波

Energy of electromagnetic waves By Maxwell's equations: Which is called the intrinsic resistance of the medium(媒质的特征阻抗)

Energy of electromagnetic waves By Maxwell’s equations: Which is called the intrinsic resistance of the medium（媒质的特征阻抗） c B E 

w-- Determine the energy the waves transports per unit time per unit area as the Poyting vector(坡印亭 向量) 5= 1 ExB=E×H 40 Which is w*c,the intensity of the waves

Determine the energy the waves transports per unit time per unit area as the Poyting vector（坡印亭 向量）. S E B E H          0 1  Which is w*c, the intensity of the waves