jan 1, 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.
Added to timeline:
Date:
jan 1, 1863
Now
~ 162 years ago