how radio waves are broadcast out of an antenna.
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An antenna is just a fancy looking electric wire. Radio waves are electricity that is so excited it has the ability to leave the wire.
To add to the antenna size part of it, the antenna size is a function of the wavelength, high freq = smaller. think of it like matching the difference between the wire and the air. Once you get the wavelength match perfect the efficiency goes up, and more of the electricity leaves the wire vs bouncing around the wire, oh yeah there’s that part where if the antenna doesn’t match the frequency the radio waves have the ability to bounce back down the wire.
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