Answer: h/p.
- A p/h
- B h x p
- C h/p
- D h x p<sup>2</sup>
Correct answer: C. h/p
Explanation: De Broglie wavelength lambda = h/p = h/(mv). Every particle has an associated wave.
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.