Answer: √1836.
- A 1/√1836
- B 1836
- C √1836
- D 1/1836
Correct answer: C. √1836
Explanation: For non-relativistic particles, λ = h/√(2mK). At equal kinetic energy, λ is proportional to 1/√m. Thus λe/λp = √(mp/me) = √1836.
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.