16 mars 1897 - J J Thompson 1856-1940
Description:
In 1897, J.J. Thomson discovered the electron. In addition, he also studied positively charged particles in neon gas. Experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged.Ajouté au bande de temps:
Date:
16 mars 1897
Maintenaint
~ Il y a 128 ans