1 янв 1863 г. - Thermionic emissions
Описание:
Thomas Edison discovers thermionic emissions.Why is this discovery important?:
1. This discovery is the basis of a vacuum tube.
2. In the old days, vacuum tubes were used in all the radio and computers.
3. Before the modern computer came out, it made a computer and the technology could improve.
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Дата:
1 янв 1863 г.
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~ 162 г назад