The electromagnetic wave is normally incident from air to an ideal medium with Er=16 , the phase velocity of the electromagnetic wave in air is V0, the phase velocity of the electromagnetic wave in the ideal medium is
A、4V0;
B、(1/2)V0;
C、(1/4)V0;
D、(1/8)V0
发布时间：2025-06-02 09:43:14
