• Corpus ID: 221738854

The theory of intensity interferometry revisited

  title={The theory of intensity interferometry revisited},
  author={Prasenjit Saha},
  journal={arXiv: Instrumentation and Methods for Astrophysics},
  • P. Saha
  • Published 15 September 2020
  • Physics
  • arXiv: Instrumentation and Methods for Astrophysics
With the current revival of interest in astronomical intensity interferometry, it is interesting to revisit the associated theory, which was developed in the 1950s and 1960s. This paper argues that intensity interferometry can be understood as an extension of Fraunhofer diffraction to incoherent light. Interference patterns are still produced, but they are speckle-like and transient, changing on a time scale of $1/\Delta\nu$ (where $\Delta\nu$ is the frequency bandwidth) known as the coherence… 

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