Answer: Particle nature.
- A Wave nature
- B Particle nature
- C Both wave and particle nature
- D Neither wave nor particle nature
Correct answer: B. Particle nature
Explanation: Photoelectric effect shows light behaves as particles (photons). Wave theory cannot explain why electrons are only emitted above a threshold frequency.
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.