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