jan 14, 1897 - J.J. Thomson
Description:
Used a CRT to experimentally determine the charge to mass ratio (e/m) of an electron =1.759 x 10 8 coulombs/gram. Hear Thompson talk about the size of an atom. Examine Thompson's 3 experiments to verify atoms had parts.Added to timeline:
Date:
jan 14, 1897
Now
~ 128 years ago