Threshold frequency — Science definition
Minimum photon frequency for single-photon photoemission.
Where it is taught
- Photons, Photoelectric Effect & Wave–Particle Models — Modern Physics, Physics & Environmental Science, Grade 12
In use
In the simple model, maximum electron kinetic energy is Kmax=hf−φ; the threshold frequency is φ/h.
Photons, Photoelectric Effect & Wave–Particle Models
Questions using threshold frequency
Problem 1
For fixed above-threshold frequency, what can increased light intensity change in the ideal photoelectric model?
Hints
State what the supplied observations or conditions establish, and separate that from any assumption.
Answer and explanation
It can increase emission rate/current, while maximum electron kinetic energy is set by photon energy minus work function.