6C  DIFFRACTION

6C10  Diffraction Through One Slit
            .10 Single Slit and Laser
            .20 Two Finger Slit
6C20  Diffraction Around Objects
            .10 Arago's (Poisson's) Spot
            .15 Knife Edge Diffraction
            .20 Thin Wire Diffraction
            .30 Pinhole Diffraction