Definition – What does CRT (Cathode Ray Tube) mean?
CRT (Cathode Ray Tube) is a technology used on old-style TVs and computer monitors. The image on the cathode ray tube display is created by firing electrons from the back of the tube in order to phosphors located toward the front of the screen. Once the electrons hit phosphors, they light-up and are projected on the screen. All the color you saw on the screen is produced by a blend of red, blue, green often referred to as RGB.
Glossary Web explains CRT (Cathode Ray Tube)
The stream of electrons is managed by magnetic charges that is what may get interference with unshielded speakers or the other magnetic devices that are closed to the CRT TVs. Modern, LCD or flat screen displays do not have face these kinds of problems since they do not require a magnetic charge. The LCD monitor also does not use the tube that is what enables them to be much thinner than the cathode ray tube monitors. While the CRT monitors are still used by professional graphic designers because of their vibrant and accurate color, LCD monitors now nearly match the quality of CRT monitors.