Phosphor

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In a context of chemistry, or when referring to cathode-ray tubes, phosphor refers to any of various compounds of transition metals or of rare earths that exhibits phosphorescence. This is not to be confused with the chemical element phosphorus (symbol P, atomic number of 15).

The choice of phosphor for a CRT is based on the intended application of the instrument. The phosphor affects:

  • trace color
  • maximum trace brightness
  • trace width
  • persistence time
  • writing rate
  • resistance to burns

Further reading