• Geometric theory of Fresnel diffraction patterns - Part IV. Sectored discs and apertures

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/021/04/0198-0202

    • Keywords

       

      Geometric Theory; Straight Edge; Curve Portion; Primary Pattern; Circular Fringe

    • Abstract

       

      Photographs of the Fresnel diffraction patterns exhibited by sectors of a circle are reproduced and are explained on the basis of the general theory developed in an earlier paper. The transition from the Fresnel to the Fraunhofer class as the size of the aperture is diminished is also illustrated with an aperture having the shape of the quadrant of a circle.

    • Author Affiliations

       

      Y V Kathavate1

      1. Department of Physics, Indian Institute of Science, Bangalore
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