Phosphor
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A phosphor is a substance that exhibits the phenomenon of luminescence; it emits light when exposed to some type of radiant energy. The term is used both for fluorescent or phosphorescent substances w
Example of phosphorescence
Monochrome monitor
Aperture grille CRT phosphors
Cathode ray tube
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A cathode ray tube is a vacuum tube containing one or more electron guns, which emit electron beams, which are directed and controlled to display images on a phosphorescent screen. The images may repr
Phosphor
…which glow on exposure to ultraviolet or visible light, and cathodoluminescent substances which glow when struck by an electron beam (cathode rays) in a cathode-ray tube. When a phosphor is exposed to radiation, the orbital electrons in its molecules are excited to a higher energy level; when they return to their former…
Oscilloscope cathode ray tube
A Macintosh computer from the 1990s with integrated CRT display
The rear of an LG.Philips Displays 14-inch color cathode ray tube showing its deflection coils and electron guns
Typical 1950s United States monochrome CRT TV