Only metals undergo photoelectric effect?

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Discussion Overview

The discussion revolves around the question of whether only metals can undergo the photoelectric effect, exploring the behavior of both metals and non-metals in this context. It touches on the characteristics of materials that influence their ability to emit electrons when exposed to light, particularly focusing on the energy of the photons involved.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants assert that most metals, particularly alkali metals, can emit electrons from visible light.
  • Others propose that non-metals can also emit electrons, but only when exposed to higher energy photons, specifically in the ultraviolet range.
  • One participant suggests that understanding the characteristics that make metals 'metallic' compared to non-metals could clarify why the photoelectric effect occurs in non-metals at higher photon energies.
  • A later reply expresses confusion regarding the previous points made, indicating a lack of clarity in the discussion.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as there are competing views regarding the ability of non-metals to undergo the photoelectric effect and the conditions under which this occurs.

Contextual Notes

There are unresolved aspects regarding the definitions of 'metallic' characteristics and the specific conditions under which non-metals can emit electrons, as well as the energy thresholds required for different materials.

Amrutha.phy
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Only metals undergo photoelectric effect?
 
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No. Most metals, especially the alkali metals, emit electrons from visible light. Non-metals emit electrons from higher energy photons, in the upper range of ultraviolet.
 
Also, you might want to ask yourself, what makes the metals more 'metallic' than other elements? Compare those characteristics to non-metals, and you'll understand why the photoelectric effect can occur in non-metals at higher photon energies.

answer:
Metals give up their electrons more easily: smaller band gap. Non-metals like to hold on to them: larger band gap.
 
I didn't get your point... Actually, I didn't get clarity...
 

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