Single slit interfernce with large particels

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    Single slit Slit
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Discussion Overview

The discussion revolves around the phenomenon of single slit interference, particularly in relation to large particles, electrons, and single atoms. Participants explore the implications of different interpretations of quantum mechanics, such as the Copenhagen and Bohm interpretations, in explaining these phenomena.

Discussion Character

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

Main Points Raised

  • One participant questions why large particles exhibit single slit interference while electrons do not, and whether single atoms display similar interference patterns.
  • Another participant asserts that the phenomenon does not require special explanations from quantum mechanics and can be understood through wave mechanics, applicable to both electromagnetic waves and particle wavefunctions.
  • A participant expresses confusion about the origin of the interference pattern, suggesting it arises from the interaction between two waves.
  • Another participant clarifies that the interference pattern results from the interaction of multiple waves, referencing Huygen's principle, which states that every point on a wavefront acts as a source of new waves.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the necessity of quantum mechanical interpretations for explaining single slit interference, with some advocating for a purely wave mechanical explanation while others raise questions about the role of quantum mechanics.

Contextual Notes

There are unresolved questions regarding the specific conditions under which large particles and electrons exhibit interference, as well as the implications of different interpretations of quantum mechanics on these phenomena.

Thenewdeal38
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Why and how do large particles emit single slit interference, also why do electrons not. Also do single atoms display single slit interferance? How is this explained by the copanhagen interpretations as opposed to the bohm interpretation? How does bohm explain single slit collapse with electrons?

http://hexagon.physics.wisc.edu/teaching/2010s%20ph531%20quantum%20mechanics/interesting%20papers/zeilinger%20large%20molecule%20interference%20ajp%202003.pdf
 
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It has no relation to QM interpretation and require no special explanation - the effect is just predicted by wave mechanics (applied either to e-m wave or to wavefunction of a particle). Electrons and photons do that too.

The pattern created by such diffraction is called Fraunhoffer's pattern, and in case of circular slit Airy's pattern:
See: http://en.wikipedia.org/wiki/Fraunhofer_diffraction
 
I thought the interference pattern came about becaue of the interaction between the two waves?
 
It comes of interaction between any number of waves. According to Huygen's principle every point on the wave front may be treated as a source of new wave. If you cut (with a single, double, or any fancy mix slit) only some of sources on the front of wave, those remaining interfere creating the pattern. To find it you must integrate partial waves coming from every point of the slit. In case of circular hole - you'll get Airy's pattern. In case of long narrow slit - you'll get Fraunhoffer's one.

See: http://en.wikipedia.org/wiki/Huygens–Fresnel_principle
 
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