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Re:2450MHz radiation induces stress and anxiety like behavio... by jazzyjackson on Wednesday October 06, 2021 @02:24AM (#28769845)
microwaves use it because water absorbs it + multiple wavelengths can fit inside the oven for even heating + easy to produce without fancy electronics

water can get shaken up by a wide band of frequencies

Re:2450MHz radiation induces stress and anxiety like behavio... by anotherhue on Wednesday October 06, 2021 @05:54AM (#28771101)
Microwaves could have used almost any frequency that was cost effective, 2.4 was a compromise to between competing companies and empirical testing.