Double Slit Experiment: Does Observing Affect Interference?

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Discussion Overview

The discussion revolves around the double slit experiment and whether the act of observing an electron affects its ability to produce an interference pattern. Participants explore concepts related to quantum mechanics, wave-particle duality, and the implications of observation on quantum behavior.

Discussion Character

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

Main Points Raised

  • Some participants assert that a single electron can produce an interference pattern when shot through two slits one at a time, while others note that observation can prevent this pattern if it identifies which slit the electron passes through.
  • One participant compares the probabilistic nature of quantum mechanics to rolling a die, suggesting that limited observations do not reveal the full statistical behavior.
  • Another participant questions whether the experimental setup changes the results, proposing that the electron might interact with the edges of the slits, affecting its path and the resulting interference.
  • Some participants express skepticism about the explanation that an electron interferes with itself, arguing that it should only occupy one position in space at any given time.
  • There is mention of superconducting loops and SQUIDs as alternative systems that can demonstrate interference without traditional slits, raising questions about the role of experimental design.
  • Participants discuss the implications of observation on the behavior of electrons, with some questioning why an observer would cause an electron to behave like a particle rather than a wave.
  • One participant draws analogies between human behavior and wave properties, suggesting that wave-like behavior does not negate the material existence of particles.

Areas of Agreement / Disagreement

Participants express multiple competing views regarding the effects of observation on quantum behavior, the nature of interference, and the validity of analogies drawn between classical and quantum systems. The discussion remains unresolved, with no consensus reached on the interpretations of these phenomena.

Contextual Notes

Participants highlight limitations in understanding quantum mechanics and wave-particle duality, with some expressing confusion over the implications of observation and the nature of quantum objects. The discussion reflects varying levels of familiarity with the concepts and experimental evidence.

  • #61
DaveC426913 said:
No. Humans cannot pass through both slits and then interfere with themselves. You can only get the interference when the objects are given the opportunity to pass through both slits (that does not mean either/or, it means *both*).
OK, thanks. So are you are saying that a "single" electron with mass can move though "both" slits at the same time (not either, or) because it is a wave function, and not a single particle ? But, if so, then why is it that this electron does not produce two dots on the screen, one associated with each slit that it moves through--since from above statement by ZZapper it was made clear that QM does not predict that a single electron moving through slits will produce two dots ?
 
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  • #62
follow the energy!

alfredblase said:
There is no change in how we describe the electron, other than to say it has transferred some of its energy.

Alfredblase
I think You nailed it. So obvious. I should have seen it myself!
Follow the energy! Like a detective follows the money.
Is the following awkward statement true?
“Directed” energy causes the particle to become a wave. When that wave strikes a “solid” barrier (no holes or slits) it releases the energy at the barrier and becomes a particle.
Mizpah
 

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