1 janv. 1863 - Thermionic emissions
Description:
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.
Ajouté au bande de temps:
Date:
1 janv. 1863
Maintenaint
~ Il y a 162 ans