Poisson Spot

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  • Shine coherent light onto a spherical object and a dim spot of light appears in the center of the object’s circular shadow. This spot is called a Poisson spot, or Arago spot, and can be explained using the wave interpretation of light.
  • Green or red lasers, diverting lens, optics track and components located in L35, section A. BB in glass slides located in L01, section B6.

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