CRT monitors are output devices that form pictures and words on a screen to convey a message that human beings understand. These are used for communication through the television and also for computers. CRT stands for Cathode Ray Tubes, which is the technology inside an analog computer monitor or a television set. These are the bulkier monitors of the older televisions and computers, but still are in use today. These monitors cost less than the flat screen LCDs more popular today, but are still high in resolution.
2) What does it look like?
3) Technology behind CRT monitors:
The cathode is a negatively charged filament (or threadlike structure) that is heated and is in a vacuum created inside a glass tube. This tube is at the very back of the screen (thus making the CRT monitors bulky and narrowing at the rear into a bottleneck). The rays are a stream of electrons generated by an electron gun that naturally pour off a heated cathode into the vacuum. In front of this vacuum are anodes (positive) that attract the electrons off the cathode. These rays are shot to the back of the monitor screen to make the pictures form. The screen is coated with phosphor that glows when struck by the electron beam. The CRT monitor creates pictures out of many rows or lines of tiny colored dots. The more lines of dots per inch, the clearer the resolution.
sources:
http://computer.howstuffworks.com/monitor7.htm
http://www.wisegeek.com/what-is-a-crt-monitor.htm
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