noun
Edison effect; thermionic emission
Technical term in physics and electronics for the emission of electrons from a heated metal or semiconductor surface.
エジソン効果は、真空管の基本原理の一つです。
The Edison effect is one of the fundamental principles of vacuum tubes.
More formal and purely Japanese term for thermionic emission, while エジソン効果 explicitly references the historical discovery by Edison.
Named after Thomas Edison, who first observed the effect in 1883. The Japanese term is a direct borrowing of the English 'Edison effect' combined with 効果 (effect).