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27-05-2015
Computers and Technology

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Which of the following electromagnetic waves is not used for communication? A.Gamma rays B.Microwaves C.Infrared Waves D.Radio Waves

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27-05-2015

We have no safe way to generate gamma rays, no cheap or convenient way to detect them, no easy way to make them carry information, and they are dangerous. So they're not a favorite for communication. The other 3 choices are all popular.

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