Equations
Momentum of a photon
Modern physics · id photon_momentum
p = \frac{E}{c}
| Symbol | Quantity | Unit | Meaning | Usual range |
|---|---|---|---|---|
p | photon momentum | kg*m/s | Momentum carried by the photon | 1e-40 to 1e-15 |
E | photon energy | J | Energy of the photon | 1e-30 to 1e-10 |
c | speed of light constant | m/s | Speed of light in vacuum |
Assumptions
- In vacuum
Valid when
- No extra conditions.
Found by
Questions with these words retrieve this equation: photon, momentum, radiation pressure, light, solar sail.
Source
OpenStax University Physics Volume 3, Chapter 6 (reference; entry written by the project). License: MIT. Entry confidence: 0.99.