Correct! A Cathode Ray Tube that is commonly referred to as a CRT is found in a Computer Monitor. The CRT is the main component and most expensive part within your computer monitor. Within the CRT are three electron guns, Red, Green and Blue. Each of these guns streams a steady flow of electrons left to right for each line of your monitor. As the electrons hit the phosphors on the CRT the phosphor will glow certain intensities. As a new line begins the guns will then begin at the left and continue right, these guns will repeat this process sometimes thousands of time until the screen has been completely drawn line by line. Once the phosphors on the CRT have been hit with an electron they will only glow for a short period of time, because of this the CRT must be refreshed which means the process will be repeated as explained above. Additional information on computer Monitors can be found on our Monitor Page.

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