Diffraction of Matter: Examining Bohr's Theory

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Discussion Overview

The discussion centers on the diffraction of matter, specifically electrons, in relation to Bohr's Theory and the conditions under which diffraction and interference patterns occur. Participants explore the implications of single-slit and double-slit experiments on the wave-particle duality of matter.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • Some participants assert that a single slit does not produce an interference pattern for matter, questioning the implications for Bohr's Theory.
  • Others argue that while light produces an interference pattern with a single slit, matter can still diffract, producing a diffraction pattern, although it may be harder to observe.
  • A participant notes that single-particle single-slit setups theoretically produce a diffraction pattern, but practical observation may be challenging.
  • One participant emphasizes that matter can indeed diffract and that double-slit experiments with matter can yield actual interference patterns, despite the increased difficulty compared to light.
  • Another participant highlights the historical context, mentioning that wave mechanics were developed by de Broglie and Schrödinger, which challenges the completeness of Bohr's Theory.

Areas of Agreement / Disagreement

Participants express disagreement on whether matter diffracts at a single slit and whether this challenges Bohr's Theory. Multiple competing views remain regarding the nature of diffraction and interference in matter.

Contextual Notes

Some claims depend on experimental conditions and setups, and there is uncertainty regarding the visibility of diffraction patterns for matter compared to light.

Mustafa Bayram
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Does matter (like electrons) diffract at the single slit and create an interference pattern on the screen? If it's not why? Isn't that violation of Bohr's Theory?
 
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You need two slits for an interference pattern
 
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light does interference pattern with a single slit, but matter doesn't. What happens to Bohr's wavelength? What happens to the wave-particle duality of matter?
 
Mustafa Bayram said:
Does matter (like electrons) diffract at the single slit and create an interference pattern?
The single-slit pattern is often called a diffraction pattern instead of an interference pattern (although it might be more sensible to call them both self-interference patterns). In principle single-particle single-slit setups will produce a diffraction pattern, although in practice the effect may be difficult to observe.
 
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Mustafa Bayram said:
light does interference pattern with a single slit, but matter doesn't.
This is simply not true.

If you set up the experiment well matter will *diffract*. And more interestingly if you do a double slit experiment with matter you can get actual interference.

It is more difficult to do with matter, but it still happens.
 
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Mustafa Bayram said:
Does matter (like electrons) diffract at the single slit and create an interference pattern on the screen? If it's not why? Isn't that violation of Bohr's Theory?
For the sake of historical justice, Bohr did not discover wave mechanics. This were de Broglie and Schrödinger, who among others, helped to get rid of Bohr's ad-hoc theory, which only worked for the hydrogen atom ;-).
 
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