Doublw slit experoment and fourier transform

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Discussion Overview

The discussion revolves around the relationship between the interference pattern produced by a double slit experiment and Fourier transforms. Participants explore whether the interference pattern can be considered a one-dimensional Fourier transform and the implications of performing a reverse Fourier transform to retrieve the image of the slits.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions if the interference pattern is a one-dimensional phase/amplitude Fourier transform and whether a reverse Fourier transform would yield an image of the two slits.
  • Another participant agrees with the initial proposition, noting that Fourier transforms are commonly used in X-ray crystallography to determine the structure of scatterers from diffraction patterns.
  • A different participant suggests that while the transformation relates to frequencies, additional equations would be necessary to obtain an image from the transformation.
  • One participant asserts that the interference pattern is indeed the Fourier transform of the aperture function and that a reverse Fourier transform would retrieve the aperture function, referencing the principles of Fourier optics.

Areas of Agreement / Disagreement

Participants express varying degrees of agreement on the relationship between the interference pattern and Fourier transforms, but there is no consensus on the specifics of retrieving an image or the necessity of additional equations.

Contextual Notes

Some assumptions about the nature of the Fourier transform and its application to the double slit experiment may not be fully articulated, and the discussion does not resolve the mathematical steps involved in the transformation process.

brianhurren
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is the interference pattern produced by a double slit a one dimensional phase/amplitude Fourier transform?
and if you did a reverse Fourier transform on it would you get an image of the two slits?
 
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Basically, yes.
FT is frequently used in XRay crystallography to help find the structure of a complicated scatterer from its diffraction pattern.
 
Maybe. Since the transformation deals with frequencies, though, you would need to plug it into another equation to get the image.
 
Yes, the (scalar) interference pattern is the Fourier transform of the aperture function (transmission as a function of position). A reverse Fourier transform would indeed retrieve the aperture function - this is the principle behind Fourier optics.

Claude.
 

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