jan 31, 1897 - Cathode Ray Tube
Description:
The Cathode Ray are streams of electrons observed in vacuum tubes, If an evacuated glass tube is equipped with two electrodes and a voltage is applied, glass behind the positive electrode is observed to glow, due to electrons emitted from and traveling away from the cathode. Invented by Karl Ferdinand BraunAdded to timeline:
Date:
jan 31, 1897
Now
~ 127 years ago
