Calculate the wavelength of a photon

Last Updated: January 12, Fact Checked. This article was co-authored by Meredith Juncker, PhD.

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.

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:.

The energy to wavelength formula relies upon two other equations: the wave speed equation and the Planck—Einstein relation.

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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. Frequency f of a wave refers to how many times per a given time duration the particles of a medium vibrate when the wave passes through it. Remember about the proper units! If in trouble, you can always use the speed conversion.

Calculate the wavelength of a photon

The wavelength of photons tells us about their energy. So in this article, we will look at what is the wavelength of photons and how to find it. Let us begin. Photons travel through electromagnetic waves. As the photon is ultimately a part of the electromagnetic wave, its wavelength will be the same as the electromagnetic wave. If the energy and frequency of a photon are known, then from that, one can easily find the wavelength of the photon. As the energy that is contained by photons is not divisible, they are often described as energy packets.

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How do I calculate energy from wavelength? This is because photon energy is proportional to a constant over the wavelength. Check your answer by multiplying the wavelength by the frequency. To calculate photon energy from wavelength: Make sure your wavelength is in meters. How to. Skip to Content. As the wavelength increases, the energy of the photon decreases. The frequency is already written in scientific notation. Bahasa Indonesia: Menghitung Panjang Gelombang. Updated: January 12, For example: What is the wavelength of a 70 Hertz sound wave traveling at meters per second? Check out the impact meat has on the environment and your health.

With this photon energy calculator, you can explore the relationship between the wavelength and frequency of the photon and its energy. Read the text below to find out how to calculate the energy of a photon and what is Planck's equation.

Have you the energy of two waves that have undergone a constructive or destructive interaction and want to find the new wavelength? If you found the right value for the wavelength, multiplying by the frequency should get you the wave speed you started with. Anonymous Mar 8, Once you have rearranged the equation, you can solve for the wavelength by plugging in the variables for energy. More reader stories Hide reader stories. Wavelength calculations often involve very large numbers, especially if you're working with light speed. Speed can be represented using both metric and imperial units. Her studies are focused on proteins and neurodegenerative diseases. Plug in the known variables and solve. This value, divided by the given frequency, will give you wavelength. Part 1. Calculating wavelength is easy as long as you know the correct equation. Nederlands: Golflengte berekenen.