| electron gun | 1 |
| use hot cathode | 0.39 |
| become in 1922 | 0.36 |
| call flat panel | 0.25 |
| dump in local construct… | 0.16 |
| one or more electron gu… | 0.68 |
| a fluorescent screen | 0.54 |
| a phosphorescent screen | 0.53 |
| lead | 0.49 |
| cadmium | 0.21 |
| mercury | 0.16 |
| barium | 0.16 |
| a vacuum tube | 0.68 |
| used in computer monito… | 0.68 |
| used in television | 0.61 |
| used to display image | 0.52 |
| used in oscilloscope | 0.41 |
| invented in 1897 | 0.39 |
| developed by john b. jo… | 0.36 |
| invented by karl ferdin… | 0.30 |
| bought | 0.21 |
| developed by the radio … | 0.21 |
| smashed by hand | 0.16 |
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