Answer: electrons.
- A electrons
- B protons
- C photons only
- D neutrons
Correct answer: A. electrons
Explanation: Greater intensity means more photons, so more electrons are ejected per second.
In the photoelectric setup, light striking the metal plate ejects electrons that cross the evacuated tube to the collector, producing a measurable current on the ammeter.
Concept context
Photoelectric effect, de Broglie waves, Bohr's model, atomic spectra.