jan 1, 1897 - J. J. Thomson cathode ray experiment
Description:
Thomson used a cathode ray to emit a ray of electrons. based on the faact that these electrons were deflected by the magnets, he was able to prove the existance of electrons, which allowed him to form a new model that involved negative subatomic particlesAdded to timeline:
Date:
jan 1, 1897
Now
~ 128 years ago