21 май 1897 г. - Sir J.J Thomson
Описание:
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.Добавлено на ленту времени:
Дата:
21 май 1897 г.
Сейчас
~ 128 г назад