Equations
Photon energy from wavelength
Modern physics · id photon_energy_wavelength
E = \frac{h c}{\lambda}
| Symbol | Quantity | Unit | Meaning | Usual range |
|---|---|---|---|---|
E | photon energy | J | Energy of one photon | 1e-30 to 1e-10 |
h | Planck constant | J*s | Planck's constant | |
c | speed of light constant | m/s | Speed of light in vacuum | |
lam | wavelength | m | Wavelength of the light | 1e-16 to 100000 |
Assumptions
- Single photon in vacuum
Valid when
- No extra conditions.
Found by
Questions with these words retrieve this equation: photon, energy, wavelength, light, nanometers, color, laser.
Source
OpenStax University Physics Volume 3, Chapter 6 (reference; entry written by the project). License: MIT. Entry confidence: 0.99.