Solving a problem in physics section 42 point 21 optics

Solving a problem in physics section 42 point 21 optics

21. At diaphragm with a circular hole with a diameter d = 5 mm is normally incident parallel light beam with a wavelength λ = 0,6 mm. Determine the distance from the observation point to the hole if the hole opens: 1) two Fresnel zone; 2) Three of the Fresnel zone.

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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)