• Geometric theory of Fresnel diffraction patterns - Part VI. Circular obstacles and apertures

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/021/04/0208-0210

    • Keywords

       

      Geometric Theory; Central Spot; Circular Aperture; Dark Ring; Fresnel Diffraction

    • Abstract

       

      The explanation given by Raman and Krishnan for the difference in the intensities of the central bright spots given by a sphere and a disc of the same diameter has been verified by using four such pairs of different sizes. The Fresnel diffraction pattern of a circular aperture in the region of shadow has been photographed and the transition of this to the Fraunhofer pattern as the size of the aperture is diminished is illustrated.

    • Author Affiliations

       

      Y V Kathavate1

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