katoderør
A katoderør, also known as a cathode ray tube (CRT), is a specialized vacuum tube in which a beam of electrons is projected onto a phosphorescent surface. This projection causes the surface to emit light, creating a display. The electron beam is generated by an electron gun at the rear of the tube and is controlled by electrostatic or magnetic fields. These fields deflect the beam, allowing it to scan across the screen in a specific pattern, typically from top to bottom and left to right.
The inner surface of the front of the katoderør is coated with phosphors, which glow when struck
Katoderør were widely used in older television sets, computer monitors, and oscilloscopes. Their ability to produce