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.
Egunr. electron gun image Egun User Liftarn image Egun Like Egun but mirrored to the right in order to have the beam traveling from left to right Vacuum tubes Cathode ray tubes Electron guns
Page 2023 Free-images.com. All images are Public Domain