The Photon Energy from Wavelength calculator compute the energy of a photon based on Planck's constant (h), the speed of light (c) and the wavelength of the photon ( λ).
INSTRUCTIONS: Choose units and enter the following:
- ( λ) This is the wavelength of the photon
Energy of Photon (E): The calculator returns the energy in Joules. However, this can be automatically converted to compatible units via the pull-down menu.
The Math / Science
The energy of a photon depends only on its wavelength. The formula for the energy of a photon is:
E= h•c / λ
where:
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:
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