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A comment on The Problem with Mobile Phones. Parent comment

Re:The Problem with Mobile Phones by stephengillie on Thursday April 30, 2015 @08:01PM (#9468420)
I thought Faraday cages had to be powered to block EM waves...
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Re:The Problem with Mobile Phones by msftie on Thursday April 30, 2015 @08:03PM (#9468434)
You just need a conductive metal container.

http://en.wikipedia.org/wiki/Faraday_cage

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