In physics|lang=en terms the difference between photocathode and photoinjector
is that photocathode is (physics) a cathode that emits electrons when exposed to light while photoinjector is (physics) a device that uses a photocathode to generate a beam of electrons.
As nouns the difference between photocathode and photoinjector
is that photocathode is (physics) a cathode that emits electrons when exposed to light while photoinjector is (physics) a device that uses a photocathode to generate a beam of electrons.
photoinjector
English
Noun
(
en noun)
(physics) A device that uses a photocathode to generate a beam of electrons