Radar and microwave ovens have a vacuum tube {magnetron} in a magnetic field. Magnetic field rotates electron flow from hot cathode to anode. Rotation makes electron spokes that alternate on and off, at 2.45 gigahertz for microwave ovens, and resonate with an antenna that radiates microwaves.
Practical Affairs>Machine>Kinds>Electric>Microwave
7-Machine-Kinds-Electric-Microwave
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Date Modified: 2022.0224