Photoelectric Effect
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Photoelectric Effect
Does anyone know if E(excess) is the same thing as the kinetic energy of the electron?
Thanks
Thanks
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Re: Photoelectric Effect
Yes (: Because kinetic energy is the excess energy that results when the energy of the photon is greater than the work function.
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Re: Photoelectric Effect
I believe it is the same, as the general equation is E(photon) - work (threshold energy) = Kinetic energy, so the kinetic energy would be the excess energy after the ejection of the election.
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Re: Photoelectric Effect
Yes! It's the same because when the energy of a photon is greater than the work function needed to eject the electron, the electron is thus ejected with a kinetic energy, aka "excess energy" because this extra energy wasn't needed to eject the electron, as the work function energy was already met. Also, as a reminder, the difference between the E photon and the work function is the excess energy. Hope this helps!
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Re: Photoelectric Effect
Yes, it is the same thing.
We know, kinetic energy = energy of incident light - threshold energy. Thus, it is evident from the equation that the excess energy corresponds to kinetic energy
We know, kinetic energy = energy of incident light - threshold energy. Thus, it is evident from the equation that the excess energy corresponds to kinetic energy
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Re: Photoelectric Effect
Yes, I'm pretty sure that the excess energy is the same as the kinetic energy because the kinetic energy is the excess energy that is produced when the energy of the photon is greater than the work function.
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Re: Photoelectric Effect
Yes the excess energy is still classified as kinetic energy. If the work function is less than the energy of a photon, then the 'excess' kinetic energy of the electron will result as the difference. Since electrons have mass, this energy would be kinetic.
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Re: Photoelectric Effect
George Hernandez 2J wrote:Yes the excess energy is still classified as kinetic energy. If the work function is less than the energy of a photon, then the 'excess' kinetic energy of the electron will result as the difference. Since electrons have mass, this energy would be kinetic.
Thank you! This was a good explanation that helped. :)
Re: Photoelectric Effect
Yes, because the after the minimum energy needed to eject an electron from a particular surface, the excess energy is the same as the kinetic energy of the electron.
Re: Photoelectric Effect
If there is an excess of electrons then the electrons have to go somewhere will all that excess energy and they will have a kinetic energy(Conservation of energy).
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Re: Photoelectric Effect
Yes E(excess) is equal to the kinetic energy, because that's the energy in "excess" after the minimum energy required to eject an electron is reached if that makes sense. Hope this helps!
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Re: Photoelectric Effect
Yes it is. The energy of the photon-the threshold energy is = to the kinetic energy.
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Re: Photoelectric Effect
The excess energy is thought of as kinetic energy because excess energy is transferred into the electron to give it the energy to move from the metal. Hence, it is kinetic.
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Re: Photoelectric Effect
Yes, we can rearrange the formula to
E(photon) - threshold energy = kinetic energy or excess energy
E(photon) - threshold energy = kinetic energy or excess energy
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