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`p = (hf)/c`

Enter a value for all fields

The **Momentum of a photon (`f`) **equation is used to the find the momentum a photon of light has where:

- `h` = Plank's constant
- `c` = speed of light
- `f` = frequency

**Momentum(p):** The equation returns momentum(p) in kg*m/s.

34.2 How much light is one photon by Benjamin Crowell, Light and Matter licensed under the Creative Commons Attribution-ShareAlike license.