this post was submitted on 13 Sep 2023
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France bans iPhone 12 after finding radiation levels are too high (www.techspot.com)
submitted 1 year ago by [email protected] to c/[email protected]
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[โ€“] [email protected] 4 points 1 year ago* (last edited 1 year ago) (1 children)

and different parts of the body resonate at different frequencies...~~part of the reason ~2.4 GHz was picked for the common household microwave is water molecules resonate there~~ (and other harmonically related frequencies too... it's why a lot of the unlicensed ISM stuff is allocated there: crappy atmospheric propagation). also the necessary magnetron and waveguide for that freq is conveniently sized for a kitchen appliance and not too complicated.

EDIT: see proper principle of operation in reply below

[โ€“] [email protected] 5 points 1 year ago

It is a common misconception that microwave ovens heat food by operating at a special resonance of water molecules in the food. Instead, microwave ovens heat by causing molecules to spin under the influence of a constantly changing electric field, usually in the microwave frequencies range, and a higher wattage power of the microwave oven results in faster cooking times.