Partly, the water will absorb, yes, but the aluminium foil is a cheap way to create a Faraday cage. Try wrapping a mobile phone in bacofoil and it will no longer send or receive ;-)
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Partly, the water will absorb, yes, but the aluminium foil is a cheap way to create a Faraday cage. Try wrapping a mobile phone in bacofoil and it will no longer send or receive ;-)