Recent content by Vipanj

  1. Vipanj

    I How can we visualise a half period zone inside a zone plate?

    By definition (n)th half period zone is the annular area between (n-1)th and (n)th circle in a plane wavefront. Then how can a black region in zone plate can have a half period zone ?
  2. Vipanj

    I How can we visualise a half period zone inside a zone plate?

    how can we consider/ visualise a half period zone inside blackened portion of +ve zone plate ?
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