Created By : Abhinandan Kumar

Reviewed By : Rajashekhar Valipishetty

Last Updated : May 16, 2023

The handy tool for Photon Energy Calculator helps you to save time by automating the computation procedure. All you need to do is simply enter the wavelength, frequency and tap on the calculate button to determine the photon energy in a matter of seconds.

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Wavelength of photon(λ):

Photon Energy Formula

The energy carried by a single photon is referred to as photon energy. The photon's electromagnetic frequency is directly proportional to the amount of energy it contains, and consequently the wavelength is inversely proportionate.

The Photon Energy Formula is E = h*f

  • Here, h be the Planck constant, Its value is 6.6261 x 10-34J.s
  • E be the energy of a photon
  • f be the frequency

You can checkout more concept with to get quick answers by using this free tool.

Planck's Equation

We notice that the light has a wavy quality to it. It refracts, diffracts, and interferes. At a microscopic level, however, it is carried by the photon, a miniscule particle of energy. Planck's equation calculates the energy of a single photon as a small number.

The Planck's equation is E = h*c/λ

  • Here, h be the Planck constant, Its value is 6.6261 x 10-34J.s
  • E be the energy of a photon
  • c is the speed of light
  • λ is the wavelength of a photon

The Planck equation uses a Planck constant h equal to connect the frequency of a photon to its energy.Its value is h=6.6261×10−34 J*s. The Planck constant is expressed in the units (energy)*(time), and it can be thought of as a factor for converting energies to frequencies.

How to use the Photon Energy Calculator?

The free online photon energy calculator calculates the photon energy data in a fraction of a second. Simply follow the steps below to get the best results.

  • All you have to do is input the photon's wavelength, frequency in the tool's designated field and then press the calculate button
  • The online calculator displays the energy of photons explaining the entire process.

Photon Energy Examples

Question 1: Find the the frequency of photon and wavelength when the energy of photon is 5ev.


Consider the problem, we have

Photon Energy,E = 5eV

We know the formula to calculate the frequency of the photon Energy is f = E / h * 6.242 * 1018.

Here, h = 6.6261×10-34 Js and c = 299792458 m/s

Substituting the inputs into the above formula, we get

Frequency ,f = 5 / 6.6261 * 10-34 * 6.242 * 1018

Photon frquency(f) = 1208894089132177.2 Hz

As a result,The frequency of the Photon Energy: f = 1209.2 Hz

FAQs on Photon Energy Calculator

1. What is the energy content of a photon?

This equation: E = hv, can be used to calculate the energy of a single photon, where h is Planck's constant and v is velocity. A photon's energy is about equal to 10-19 joules.

2. What factors influence photon energy?

The energy of a photon is determined by the frequency or wavelength of the radiation. The photon energy increases as the frequency rises. The energy of photons increases as the wavelength is reduced.

3. When the wavelength of a photon is doubled, what happens to its energy?

The energy of a photon, according to Einstein's Quantum Theory of Light, is the product of Planck's constant and frequency, hence doubling the wavelength reduces the energy by half.

4. What happens when a photon's energy increases?

Because energy is proportional to frequency, when energy rises, the frequency rises as well and the wavelength shrinks. Because the wavelength is inversely proportional to the energy.