Answer: Wave nature of electrons.
- A Wave nature of electrons
- B Particle nature of photons
- C Photoelectric effect
- D Nuclear model of atom
Correct answer: A. Wave nature of electrons
Explanation: Davisson and Germer (1927) showed electron diffraction from a crystal: confirming de Broglie's hypothesis of electron waves.
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.