光こう陰いん極きょくMeanings1nounphotocathodeTechnical term in physics and electronics for an electrode that emits electrons when exposed to light.光こう陰いん極きょくは光こう電でん子し増ぞう倍ばい管かんの重じゅう要ような部ぶ品ひんです。The photocathode is an important component of a photomultiplier tube.
