Diffraction Through One Slit 6C10.10 Single Slit and Laser
  6C10.20 Two Finger Slit
Diffraction Around Objects 6C20.10 Arago's (Poisson's) Spot
 

6C20.15 Knife Edge Diffraction

 

6C20.20 Thin Wire Diffraction

 

6C20.30 Pinhole Diffraction