6C10  Diffraction Through One Slit
            .10 Single Slit Diffraction
            .12 Single Slit Diffraction (Cornell Slides)
            .50 Microwave Diffraction
6C20  Diffraction Around Objects
            .10 Poisson's Bright Spot
            .15 Knife Edge Diffraction
            .20 Thin Wire Diffraction
            .22 Shadow of Needle
            .30 Pinhole Diffraction