57. A point source of light (λ = 0,5 m) is located at a distance of a = 1 m in front of the diaphragm with a circular hole with a diameter d = 2 mm. B Determine the distance from the diaphragm to the observation point, if the hole opens three Fresnel zone.
Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)
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