What Does Cathode Ray Tube (CRT) Mean?
A cathode-ray tube is a display device used in television sets and computer monitors. It is a kind of vacuum tube which contains one or more electron guns, electrostatic deflection plates and a phosphor target which is located at the back of the glass screen. A cathode for which the CRT got its name is a positive terminal at which electrons may enter.
Techopedia Explains Cathode Ray Tube (CRT)
A cathode ray tube is a specialized vacuum tube where images can be created by shooting electrons beams at the phosphorescent surface. The CRT also known as the picture tube was the only choice for a display device up until the less bulky and less power hungry LCD was invented. They usually employ magnetic deflection for changing the orientation of the electron beams but other types use electrostatic deflection. These are usually used in oscilloscopes as magnetic deflection which would lessen the inductive reactance of the magnetic coils and limit the frequency response of the oscilloscope.
