Diffraction

For the straight edge, there was definitely sight of diffraction because there was light in the area in which there was supposed to be a sort of shadow region of the observed object. The intensity was less than in the other areas, but there was still light visible. For the edge/opaque disks the general existence of there being a dot in the center translated, but there was still light everywhere. For the circle, where a dark center is observed, that translated into the projection of a laser. So there was a dot in the center that was darker, but not completely light-less. Diffraction is occuring in these cases because it occurs when light bends around a sharp edge.