Light & Electrons: Effects of Color on Sodium Metal Electron Release

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Discussion Overview

The discussion centers on the effects of light color on the release of electrons from a sodium metal surface, specifically exploring the photoelectric effect. Participants consider experimental design and the theoretical implications of photon energy in this context.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions the relationship between light color and electron release, suggesting a connection to Bohr or photons.
  • Another participant asserts that the photoelectric effect, as explained by Einstein, is central to understanding this phenomenon.
  • There is a discussion about the role of photon energy, with one participant noting that higher intensity light results in more photons, potentially ejecting more electrons, but emphasizes that photon energy must be sufficient to release an electron.
  • A participant seeks clarification on what is transferred to the electron when light is shone on a metal, leading to a discussion about energy and momentum.

Areas of Agreement / Disagreement

Participants generally agree on the relevance of the photoelectric effect to the question, but there are varying levels of understanding and clarity regarding the details of the effect and the role of photon energy.

Contextual Notes

Some assumptions about the relationship between light frequency and electron release remain unaddressed, and the discussion does not resolve the specifics of the experimental design proposed.

Roxy
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What effect does the color of the light have on the release of electrons from a sodium metal surface?

(a) Write a brief experimental design to answer this question
(b) Would you expect all the colors of light to release electrons from the sodium metal? Justify your answer using the idea of photons.

I think it has something to do with Bohr or photons?? I don't know where to start.
 
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No,it has to do with the explanation A.Einstein found exactly 100 yrs ago to the PHOTOELECTRIC EFFECT...

Daniel.
 
dextercioby said:
No,it has to do with the explanation A.Einstein found exactly 100 yrs ago to the PHOTOELECTRIC EFFECT...

Daniel.


So, I just explain the photoelectric effect for (a).

I know this about it, but I don't know how to explain it (I think this is right):
The photoelectric effect says that when you shine light on a metal it transfers to the electron.

Higher intensity light has more photons, and so will knock out more electrons. However, if the frequency of the light is such that a single photon is not energetic enough to release an electron from the surface, then none will be ejected no matter how intense the light.
 
Last edited:
Yes,that's pretty much what happens.

Daniel.
 
Roxy said:
The photoelectric effect says that when you shine light on a metal it transfers to the electron.
Transfers what ?
 
energy? .
 
Energy and momentum,of course...

Was the question intended for you...?:confused:

Daniel.
 

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