Cathode ray: stream of electrons and the basis of cathode ray tubes Cathode ray Cathode rays are streams of electrons emitted from a cathode in vacuum tubes. They underpinned discoveries of the electron and powered cathode ray tubes used in displays, oscillosc…
Vacuum tube (electron tube, valve): overview, operation, history, and uses Vacuum tube An electron tube (vacuum tube or valve) controls electric current by thermionic emission. Once central to radios, TVs and early computers, tubes remain in niche high-power and audi…
