Photoelectric effect and bound electrons

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Discussion Overview

The discussion revolves around the photoelectric effect, specifically addressing why incoming photons interact with bound electrons. Participants explore the nature of electrons in different materials and the energy considerations involved in the ejection of electrons.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions why the photoelectric effect specifically involves bound electrons, suggesting that there is a distinction in how electrons behave in different materials.
  • Another participant explains that electrons require a certain work function or energy to be freed, citing the influence of induced positive charge in conductors as a factor that affects electron escape.
  • A third participant seeks clarification on the term "bound electrons," noting that in the context of the photoelectric effect in metals, electrons from the conduction band are not bound to any atom.

Areas of Agreement / Disagreement

Participants express differing views on the definition and role of bound electrons in the photoelectric effect, indicating that the discussion remains unresolved with multiple competing perspectives.

Contextual Notes

There are assumptions regarding the definitions of bound versus free electrons that are not fully explored, and the discussion does not resolve the implications of these definitions on the photoelectric effect.

usman1984
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Hi. My question is why in photoelectric effect in coming photon interacts with bound electrons only?
Thanks
 
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The way I understand it, the electron will always have some work function/energy required to free it because, e.g. in the case of conductors, a positive charge gets induced around the electron trying to pull it back when it tries to escape the surface. Meanwhile, for the case of insulators, the electrons are not free.
 
Thanks Charles
 
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What do you mean by "bound electrons"?
The photoelectric effect in a metal ejects electrons from the conduction band. These electrons are not "bound" to any atom.
Maybe you could explain in more detail what do you mean with your question.
 
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