Equations
Photoelectric effect
Modern physics · id photoelectric_effect
K_{max} = h f - \phi
| Symbol | Quantity | Unit | Meaning | Usual range |
|---|---|---|---|---|
KE | maximum kinetic energy | J | Kinetic energy of the fastest ejected electrons | 0 to 1e-15 |
h | Planck constant | J*s | Planck's constant | |
f | frequency | Hz | Frequency of the incident light | 1e+13 to 1e+18 |
phi | work function | J | Minimum energy to free an electron | 1e-20 to 1e-18 |
Assumptions
- Light above the threshold frequency
Valid when
- No extra conditions.
Found by
Questions with these words retrieve this equation: photoelectric, work function, electron, light, threshold, einstein.
Source
OpenStax University Physics Volume 3, Chapter 6 (reference; entry written by the project). License: MIT. Entry confidence: 0.99.