I once put a mobile phone into the microwave as an experiment, and tried to call it and it still rang. I thought this should not happen?.
Never thought of trying that. Interesting (and disturbing).
I'd agtee. Suggests the Faraday cage is leaky to some wavelengths. I suppose the story will be that it'll never produce these wavelengths in any fault condition, and/or they are harmless
I'm a bit afraid of microwave ovens, and when I had one, used to hide as far away as convenient (preferably out of the room) until it "pinged"
Admittedly my microwaves have usually been retreived from the side of the road, but I'd be scared of a new one too
I THINK there's one in the Edinburgh flat, probably put in by my nephews when they were living there, so I'll try your test when I get back there
According to Wickipedia "A microwave oven uses a partial Faraday shield (on five of its interior six sides) and a partial Faraday cage, consisting of a wire mesh, on the sixth side (the transparent window), to contain the electromagnetic energy within the oven and to protect the user from exposure to microwave radiation" so I guess the mesh size is too large to suficiently attenuate the phone signal
According to my browser AI OTOH "Microwave ovens typically use a frequency of 2.45 GHz (wavelength of 12.2 cm), while cell phones operate across a range of frequencies, including those around 2.4 GHz and others from 800 MHz to 1.9 GHz" so not dramatically different.
However (a) Thats a generalisation, and (b) The AI seems to be using Quora as a source, "traditionaly The Big Boys Broadcast Bumper Book of Absolute B******s"
So I dunno
Edited by edlithgow on 04/07/2025 at 07:16
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