§1-3平面电磁波 5.平面波的性质 (1)电磁波是横波:V·E=0→>k·E=0 (2)E和B互相垂直k×E=OB→B=-k×E (3)E和B同相: B=√EF0 k×E E§1-3平面电磁波 ◼ 5.平面波的性质 ◼ (1)电磁波是横波: ◼ (2)E和B互相垂直 ◼ (3)E和B同相: v B k E = = = 1 B E 0 k E B B k E = = 1 = 0 k E = 0 E