Calculate the wavelength of a photon

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?

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:.

Calculate the wavelength of a photon

Last Updated: January 12, Fact Checked. This article was co-authored by Meredith Juncker, PhD. Her studies are focused on proteins and neurodegenerative diseases. There are 7 references cited in this article, which can be found at the bottom of the page. This article has been fact-checked, ensuring the accuracy of any cited facts and confirming the authority of its sources. This article has been viewed 1,, times. Wavelength is the distance of 1 frequency wave peak to the other and is most commonly associated with the electromagnetic spectrum. If you know the speed and frequency of the wave, you can use the basic formula for wavelength. If you want to determine the wavelength of light given the specific energy of a photon, you would use the energy equation. Calculating wavelength is easy as long as you know the correct equation. This equation can also be used to determine the maximum wavelength of light necessary to ionize metals. Simply use the energy required for ionization and solve for the corresponding wavelength. Just plug in the wave's speed and frequency to solve for the wavelength.

Many, many problems in physics and chemistry require you to use an energy-to-wavelength calculator. This can be seen if you examine the relationship between the two values - energy is inversely proportional to wavelength.

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If you're seeing this message, it means we're having trouble loading external resources on our website. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Donate Log in Sign up Search for courses, skills, and videos. Introduction to electromagnetic waves. Properties of electromagnetic radiation and photons. Electromagnetic radiation is one of the many ways that energy travels through space. The heat from a burning fire, the light from the sun, the X-rays used by your doctor, as well as the energy used to cook food in a microwave are all forms of electromagnetic radiation. While these forms of energy might seem quite different from one another, they are related in that they all exhibit wavelike properties. Waves are simply disturbances in a particular physical medium or a field, resulting in a vibration or oscillation.

Calculate the wavelength of a photon

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.

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The wave speed equation looks like this:. A common mistake here is calculating a new frequency for the wave. The wavelength equals nm. Most questions answered within 4 hours. Remember to use the correct units when you're using the formula and writing your answer. The new speed is equal to v 1. This article was co-authored by Meredith Juncker, PhD. However, if for some reason it does not, please check out our other relevant tools:. Calculate wavelength with the wavelength equation. This helped me a lot to learn the formulas and how to use them.

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?

Do not change frequency when a wave enters a different medium. Manipulation of the formulas is then required. 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. How do I calculate energy from wavelength? If they do not make sense when you finish, then check to see if you used the right units. No account yet? Anonymous Mar 8, Submit a Tip All tip submissions are carefully reviewed before being published. Did this article help you? Not Helpful 50 Helpful Edit this Article. By continuing to use our site, you agree to our cookie policy. Add comment. Use the sound wavelength calculator to study the behavior of sound waves in different mediums.