Answer: h/p.
- A h/p
- B the product hp
- C h/p²
- D p/h
Correct answer: A. h/p
Explanation: The matter wavelength is λ = h/p.
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.