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Faraday cages are much the same thing, but are built with mesh rather than out of continuous material. You’ve probably spotted shielding on all kinds of equipment, such as in stereo systems or ...
Shielding is crucial for all manner of electronic devices. ... A Faraday cage or shield will do the trick. At times, though, it would be desirable to shield and unshield a device at will.
This is exactly what a Faraday cage does: It cancels an EM field by creating a second one in the opposite direction. Thanks to superposition, the two fields cancel and create a net field of zero.
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