Answer: hc/(eV).
- A hc/(eV)
- B h/(eV)
- C eV/(hc)
- D hV/(ec)
Correct answer: A. hc/(eV)
Explanation: Duane-Hunt law: lambda_min = hc/(eV). All electron KE converts to single X-ray photon.
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.