Answer: intensity.
- A intensity
- B frequency
- C direction
- D source
Correct answer: A. intensity
Explanation: Intensity cannot compensate for too low a frequency - the effect depends on frequency.
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.