Enter the wavelength and frequency of a photon into the calculator. The calculator will display the total energy of that photon.
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Energy of a Photon Formula
The following equation can be used to calculate the energy of a particular photon.
E = h * c / λ = h * f
- E is the energy of a photon
- h is the Planck constant, (6.6261 × 10−34 J*s)
- c is the speed of light, (299 792 458 m / s)
- λ is the wavelength of a photon,
- f is the frequency of a photon.
Photon Energy Definition
Photon energy is defined as the total kinetic energy contained within one photon of light.
How to calculate photon energy?
How to calculate photon energy
- First, determine the wavelength
This will be the wavelength of the path the photon is traveling.
- Next, determine the frequency of the photon
This will be the frequency of the wavelength from step 1.
- Calculate
Calculate the energy of the photon using the wavelength and frequency along with the Planck constant (6.6261 × 10−34 J*s) and speed of light. (299 792 458 m / s). Just plug all 4 pieces of information into the formula above.
FAQ
Photon Energy is the total kinetic energy a particular photon has. Energy typically is measured in joules on smaller scales, but photons are so minuscule that they use units designed for even smaller scales like the electronvolt.