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Description
Flashcards by alex.examtime9373, updated more than 1 year ago
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Created by alex.examtime9373
about 10 years ago
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| Question | Answer |
| Thermionic emission | The emission of electrons from the surface of a hot metal |
| Temperature requirement for thermionic emission | 800 degrees celsius |
| Work function | The minimum energy needed to remove an electron from a metal to a point in the vacuum immediately outside the solid surface |
| Cathode Ray Tube | A vacuum tube in which images are produced when an electron beam strikes a phosphorescent surface |
| Components of a cathode ray tube | Filament, cathode, anoder, vacuum tube, fluorescent screen |
| Energy conversion in a cathode ray tube | Kinetic energy --> light energy |
| Practical use of a cathode ray tube | Televisions |
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