36,375
edits
Phosphor: Difference between revisions
no edit summary
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
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). | 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) which emits light due to chemiluminescence, not phosphorescence. | ||
CRT phosphors were standardized beginning around World War II and designated by the letter "P" followed by a number. | |||
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: | ||