`f = E /h`

Enter a value for all fields

The Frequency 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.

The Math / Science

Note the following relations are also true:

`f = c/λ`

`f = E/h`

`E = (h⋅c) /λ` 

`λ = (h⋅c)/E`

`E = h * f`

where:

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

References

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