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Aug 15

Dear Seti


Radio

Whether we realize it or not it lies at the heart of earthly communication systems. It is coupled with Microwaves in some cases such as satellite communication. Radio is the backbone of systems like television, wi-fi, bluetooth, cellular, and probably a half dozen other related systems. Radio relies on electricity and magnets to produce a signal most often in patterns that can be translated via receiver in each and every form that I am aware of. Similar systems are employed to send most point to point digital signals, even if they do not rely on radio. In every case these rely on electricity and magnets.

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