Charged cathode rays

Cathode rays were shown to be a stream of negatively charged particles, as opposed to a form of electromagnetic radiation. This discovery clarified the nature of cathode rays, contributing to the understanding of atomic structure.
 William Crookes England 1880 Charged cathode rays

Cathode rays were shown to be a stream of negatively charged particles, as opposed to a form of electromagnetic radiation. This discovery clarified the nature of cathode rays, contributing to the understanding of atomic structure.