nov 21, 1897 - J. J. Thomson discovers the electron.
Description:
In 1897 J. J. Thomson discovered the electron. He put two anodes into a vacuum-sealed tube and applied a high voltage between the two tubes. He noticed a stream of particles moving from the negative anode to the positive anode, these were electrons.Added to timeline:
Date:
nov 21, 1897
Now
~ 128 years ago