cordless phone emits 4.0 mW at 5.8 GHz. The manufacturer claims that the phone…

A new cordless phone emits 4.0 mW at 5.8 GHz. The manufacturer claims that the phone has a range of 100 feet. spnova-new-dynamic-txt
If we assume that the wave spreads out evenly with no obstructions, what is the electric field strength at the base unit 100 feet from the phone? spnova-new-dynamic-txt
  spnova-new-dynamic-txt

 

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