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A comment on Inaccurate chart led to unwarranted fears of 5G wireless technology. Parent comment

Re:Inaccurate chart led to unwarranted fears of 5G wireless ... by taneq on Wednesday July 17, 2019 @04:04AM (#20457458)
Presumably the key property is conductivity, rather than water specifically? I'd expect a sheet of tinfoil to stop mm waves as well as wet paper.
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Re:Inaccurate chart led to unwarranted fears of 5G wireless ... by Sharlin on Wednesday July 17, 2019 @04:32AM (#20457581)
Probably it is about the fact that water is polar and readily absorbs microwaves. Which, of course, is how microwave ovens work. (The standard 2.4 GHz frequency is actually not absorbed as well as higher freqs; this is a deliberate choice to let the radiation penetrate deeper into the food and heat it more evenly.)
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