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`f = E /h`

Enter a value for all fields

The F**requency of a Photon **equation is used to calculate the frequency of a photon using the energy of a photon and Planck's constant, where:

- E = Energy
- h = Plank's constant

**Frequency(f):** The equation returns frequency in hertz. However, this can be automatically converted to other frequency units via the pull-down menu.

Note the following relations are also true:

where:

- E = energy of light
- f = frequency
- h = Planck's Constant
- c = Speed of Light in a vacuum

35.2 Dispersive waves by Benjamin Crowell, Light and Matter licensed under the Creative Commons Attribution-ShareAlike license.