Electromagnetic Spectrum for Communication Michael 2018-03-12 22:40 A20180228006 基礎 點閱 98 留言 0 E 0 T 0 免費 基礎 點閱 98 留言 0 E 0 T 0 By enlarging the portions of radio wave, microwave and infrared, an electromagnetic spectrum for communication may be obtained. The electromagnetic wave is widely used in every wireless equipment. (共同作者:Hightech)