Answer: hf.
- A h/f
- B hf
- C h x c
- D h x f x c
Correct answer: B. hf
Explanation: E = hf. Photon energy is proportional to frequency. Higher frequency = more energetic 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.