When the 2407 James Clerk Maxvell discovered electromagnetic waves is magnetic and electric wave movement together. But the waves both perpendicular. Which later was used as a carrier, which is the sound waves in the radio and brought both sound and image ในโทรทัศน์. A signal propagation from the station to the receiver, which Rudolph Henrich Hertz German scientists. Has produced a tool that can bring the electromagnetic wave to use in communication and storage. The world to recognize when the 2429. And the media what he discovered that Hertzain Wave and his name has been praised for the unit of frequency radio waves around the world recently. Which before unit of frequency. (the moving through one point at any point in time 1 seconds), called Tsai Eagle
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