photocathode

[ foh-toh-kath-ohd ]

noun

1. a cathode, typically of a cesium or sodium compound, having the property of emitting electrons when activated by light or other radiation.

photocathode

/ ˌfəʊtəʊˈkæθəʊd /

noun

1. a cathode that undergoes or is used for photoemission

Word History and Origins

Origin of photocathode¹

First recorded in 1925–30; photo- + cathode

Example Sentences

Not that the rugged photocathode tube needs much protection.

From Popular-Science