What are the initials for a picture tube?
Cathode Ray Tubes (CRTs) A cathode-ray tube (CRT) is a specialized vacuum tube in which images are produced when an electron beam strikes a phosphorescent surface. Most desktop computer displays make use of CRTs. The CRT in a computer display is similar to the picture tube in a television receiver.A CRT monitor, or Cathode Ray Tube, is a glass vacuum tube screen containing a charged cathode, which projects three electron guns: one each for red, green, and blue phosphor dots. When electricity is applied to them, these electron guns shoot rays onto a fluorescent screen, creating images.