Why cathodic ray negative electrode is cathode?

The cathodic ray negative electrode is called the cathode because it is the electrode where reduction occurs during electrochemical reactions. In a cathode, electrons are supplied from the external circuit, allowing positive ions to gain electrons and become neutral atoms. The term "cathode" originates from the Greek Word "kathodos," meaning "way down" or "descent," reflecting the flow of electrons toward this electrode. Thus, in cathodic rays, the negative electrode is designated as the cathode based on its role in facilitating electron flow and reduction.