E=hv what is e

Post by Aashna Bhandari » Wed Oct 06, pm. Post by masontsang » Thu Oct 07, am. Laurence Lavelle Skip to content. Quick links. Email Link. This works because the energy of the photon must be greater than or equal to the energy required to remove the electron. However, it could also be equal to the energy required to remove an electron if the kinetic energy is 0. If the Kinetic energy is 0, then the energy of the photon is equal to the work function. That equation is used to find the energy of a photon of light going at a certain speed.

H is Planck's constant and v is the frequency of the electron. If E is equal to or greater than the threshold energy required to release an electron from an atom, then the electron is released. The work function is the energy required to eject an electron in a photon:electron interaction. The work function or threshold energy would be the energy required to remove an electron. In lecture today Professor Lavelle showed us an example of the electron removal from a metal.

My question is can electrons be removed anywhere? Can it happen to other materials as well? Maybe when it is jumping off the metal only? The work function, on the other hand, would give you the energy needed to remove an electron. In some cases, it could also be equal to the energy required to remove an electron if the kinetic energy is 0.

If you want to find the energy contained in an electron, you would use the De Broglie equation as it is a different form of energy.

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