#arago_spot
Arago spot
Bright point that appears at the center of a circular object's shadow due to Fresnel diffraction.
In optics, the Arago spot, Poisson spot, or Fresnel spot is a bright point that appears at the center of a circular object's shadow due to Fresnel diffraction. This spot played an important role in the discovery of the wave nature of light and is a common way to demonstrate that light behaves as a wave.
Sat 7th
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