Calculate the wavelength of a photon

Last Updated: January 12, Fact Checked.

A ground state H atom absorbs a photon of energy 2. As the atom relaxes, it emits two photons: one of wavelength nm to reach an intermediate level, and a second to reach the ground state. What is the wavelength of the second photon emitted? The energy liberated by the electron falling back to the ground state must equal the energy absorbed, i. We can find the energy of the first photon given the wavelength of nm. My strategy for this was subtract the energy of the nm photon to leave an energy difference that would appear in the second emitted photon.

Calculate the wavelength of a photon

Many, many problems in physics and chemistry require you to use an energy-to-wavelength calculator. Do you have an energy transition between two states and wonder what wavelength of light this corresponds to? Have you the energy of two waves that have undergone a constructive or destructive interaction and want to find the new wavelength? If so, you've found the right place in Omni's energy-to-wavelength calculator, which will help you learn how to calculate wavelength from energy for a photon or wave! The energy to wavelength formula relies upon two other equations: the wave speed equation and the Planck—Einstein relation. The wave speed equation looks like this:. In most cases, we are looking at how a wave travels through a vacuum. In this case, v v v is actually equal to the speed of light, ,, meters per second , which we denote as c c c. Manipulation of the formulas is then required. First, replace v v v with c c c. Then rearrange the wave speed equation so that frequency is in terms of wavelength. We then substitute this formula into the Planck-Einstein equation. Finally, we must rearrange this substituted formula to get the wavelength in terms of energy:. We hope this tool provides you with everything you need to solve your problem.

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The wavelength calculator can assist you in determining the relationship between frequency and wavelength. Continue reading if you are here to learn how to calculate the frequency of a wave or look for the wavelength formula. Wave velocity v is how fast a wave propagates in a given medium. Its unit is meter per second. Check the speed calculator for more information about speed and velocity. It depends on the medium in which a wave travels. It is measured in meters.

Calculate the wavelength of a photon

Many, many problems in physics and chemistry require you to use an energy-to-wavelength calculator. Do you have an energy transition between two states and wonder what wavelength of light this corresponds to? Have you the energy of two waves that have undergone a constructive or destructive interaction and want to find the new wavelength? If so, you've found the right place in Omni's energy-to-wavelength calculator, which will help you learn how to calculate wavelength from energy for a photon or wave!

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Submit a Tip All tip submissions are carefully reviewed before being published. If the frequency of a radio wave is 4. If you know the energy of the photon, you can calculate its wavelength. Wavelength usually is expressed in units of meters. The frequency is already written in scientific notation. Once you have rearranged the equation, you can solve for the wavelength by plugging in the variables for energy. There are 7 references cited in this article, which can be found at the bottom of the page. Hello, Chris, My strategy for this was subtract the energy of the nm photon to leave an energy difference that would appear in the second emitted photon. If they do not make sense when you finish, then check to see if you used the right units. Finally, we must rearrange this substituted formula to get the wavelength in terms of energy:. The wave speed equation looks like this:. As the wavelength increases, the energy of the photon decreases.

The wavelength of photons tells us about their energy.

Bahasa Indonesia: Menghitung Panjang Gelombang. Many, many problems in physics and chemistry require you to use an energy-to-wavelength calculator. Sound wavelength Calculator Use the sound wavelength calculator to study the behavior of sound waves in different mediums. Manipulation of the formulas is then required. Yes No. Did this article help you? Table of contents The energy to wavelength formula How do I calculate wavelength from energy? My strategy for this was subtract the energy of the nm photon to leave an energy difference that would appear in the second emitted photon. To calculate photon energy from wavelength: Make sure your wavelength is in meters. The difference between this and the absorbed energy will appear in the second emitted photon, which I found to be 1. If you want to determine the wavelength of light given the specific energy of a photon, you would use the energy equation.