9 janv. 1997 - 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:
9 janv. 1997
Maintenaint
~ Il y a 27 ans
