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

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    • 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
    • Dates


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