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	In a context of chemistry, or when referring to [[~~CRT\|~~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).		In a context of chemistry, or when referring to [[cathode-ray tube]]s, '''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:		The choice of phosphor for a CRT is based on the intended application of the instrument. The phosphor affects: