Yet another question about the double slits

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Discussion Overview

The discussion revolves around the double-slit experiment, specifically focusing on the role of observation and the conditions under which an interference pattern is observed. Participants explore the implications of observation on wavefunction collapse and the nature of the observer in quantum mechanics.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions whether the presence of the physicist affects the outcome of the experiment, suggesting that the result is independent of the physicist's presence.
  • Another participant proposes that the presence of photons can destroy the superposition state, leading to wavefunction collapse, which they equate with observation.
  • A participant seeks clarification on what constitutes an "observer" or "observation" in the context of the double-slit experiment, noting that measuring an electron's position collapses the wavefunction but is curious about other forms of observation.
  • There is a repeated inquiry about whether the experiment is conducted with photons or electrons, with a later response confirming that electrons are used.

Areas of Agreement / Disagreement

Participants express differing views on the nature of observation and its impact on the experiment, indicating that multiple competing perspectives remain without a consensus on the definitions and implications of observation in quantum mechanics.

Contextual Notes

Participants do not fully resolve the definitions of "observer" or "observation," and there are assumptions about the nature of wavefunction collapse that are not explicitly stated.

intervoxel
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Apparatus: Electron source + double slit + screen + lamp.

If the lamp is left turned on but the physicist leaves the room for an hour, does he see an interference pattern when he returns?

(Sorry if this simple question has been done before)
 
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The result of the experiment has nothing to do with whether the physicist is in the room or not.
 
I see. So the photons simply destroy the superposition state, which is equivalent to an observation, collapsing the wavefunction.

Thanks
 
Is this double-slit experiment done with photons or electrons?
 
So after reading about quantum theory awhile ago, I inevitably came across the infamous double slit experiment, and I understand the concept, how the act of "observation" collapses the wave function of that which is fired through the slits, but what I did not understand fully, is what constitutes an "observer" or "observation" exactly? I know measuring where an electron is while going through the slits collapses the wave function, but what else would?
 
diazona said:
Is this double-slit experiment done with photons or electrons?

Electrons.
 

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