1 janv. 1897 - Joseph John Thomson
Description:
Used a CRT to determine the charge to mass ratio of an electron = 1.759 x 10^8 coulombs/grams; studied canal rays and found they were associated with the proton H+Ajouté au bande de temps:
Date:
1 janv. 1897
Maintenaint
~ Il y a 128 ans