This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Magnetron cutaway drawing. magnetron vacuum tube used as an oscillator to generate microwaves at high power levels used in radar sets and microwave ovens from Naval training text The tube is shown with part of the copper anode block cut away revealing the cathode and cavity resonators The magnetron shown here is several decades old