Answer: hν.
- A hν
- B h divided by ν
- C hν squared
- D ν divided by h
Correct answer: A. hν
Explanation: Photon energy E = hν, where h is Planck’s constant.
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.