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Hi there.

  1. Feb 23, 2015 #1
    Just working on my bucket list of things I don't know while I still can..
  2. jcsd
  3. Feb 23, 2015 #2
    Welcome! What is one item?
  4. Feb 23, 2015 #3
    I have always thought of RF signals as requiring a return path to complete the circuit. Yet, I can send a signal out to any point of earth without any apparent return leg. How can that be?
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