Threshold Energy
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Threshold Energy
Can someone explain what threshold energy is and how it is relevant to today's lecture? Thank you.
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Re: Threshold Energy
Threshold energy is the amount of energy required to remove an electron from an atom of a certain material. The electron will only be removed if the light source has enough energy to overcome this threshold energy.
Hope that helps!
Hope that helps!
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Re: Threshold Energy
The threshold energy is the work required to remove an electron from a metal surface. The energy of the photon must be greater or equal to the threshold energy in order to remove an electron from the surface. E(photon) - Threshold Energy = Kinetic Energy of Electron
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Re: Threshold Energy
The threshold energy is basically the minimum kinetic energy required to remove an electron. Also, the energy of photoelectrons emitted when light hits a metal depends on the frequency. When light with the right frequency is shone onto a metal surface, electrons are emitted from the surface.
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Re: Threshold Energy
Threshold Energy is the minimum required amount of E that a photon should contain for the photon to release an electron from the metal surface. The threshold E + E of the electron is equal to the E of the photon. As explained in the lecture, if the electron's E is 0, that means that the photon's E was equal to the threshold E, leaving no excess E (kinetic E)
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