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Photon energy is the energy carried by a single photon. The amount of energy is directly proportional to the photon's electromagnetic frequency and thus, equivalently, is inversely proportional to the wavelength. The higher the photon's frequency, the higher its energy.
The energy of a single photon of green light of a wavelength of 520 nm has an energy of 2.38 eV. You can use the photon energy calculator to explore further the relationship between the photon energy and its frequency or wavelength.
Explain the relationship between the energy of a photon in joules or electron volts and its wavelength or frequency. Calculate the number of photons per second emitted by a monochromatic source of specific wavelength and power.
The energy of a photon can be calculated using the correlation between Energy (E), Frequency (ν), Wavelength (λ), and Planck’s Constant (h).
We know that photon energy is expressed in the electronvolt (eV) unit and the joule. The energy of the photon is given by the formula: E = hf. Where, E = photon energy; h = Planck’s constant; f = The electromagnetic frequency measured in Hertz or Hz; The above formula is applicable to a single photon.
The energy of a single photon is: h or = (h/2 ) where h is Planck's constant: 6.626 x 10-34 Joule-sec. One photon of visible light contains about 10-19 Joules (not much!) is the "photon flux," or the number of photons per second in a beam. = P / h where P is the beam power (in watts).
This calculator computes the energy of a photon from its vacuum wavelength \lambda λ, frequency \nu ν or wavenumber \kappa κ. The photon energy is. where h \approx 6.626\cdot 10^ {-34} h ≈ 6.626 ⋅10−34 is the Planck constant and c c is the speed of light in vacuum.
In our photon energy calculator you will learn: What is a photon, and why are they so important; The equation for the energy of a photon: how to calculate the energy from the frequency; How to calculate the energy from the wavelength; and; How to calculate the number of photons in a light beam.
This free textbook is an OpenStax resource written to increase student access to high-quality, peer-reviewed learning materials.
This is Omni's wavelength to energy calculator, a tool that instantly calculates a photon's energy from its wavelength. By using Planck's equation, this tool will help you determine a photon's energy in joules (J), electronvolts (eV), or its multiples.