sunspots

I'm not a physicist, but it seems to me that something is left out of the double slit experiment. When a series of electrons are sent toward one slit while two slits are open they build up an interference pattern similar to what one would expect from a wave passing through both slits. The problem is, when you drop something in the water to create a wave, it comes from overhead, or perpendicular to the surface of the water. I wonder if a corner double slit experiment has been carried out whereby two "walls" meet at 90 degrees and electrons are sent through one of the slits. Does an intereference pattern appear? This would indicate that the wave is spherical. But if no pattern is created with a corner double slit experiment, there can be no real analogy between that event and what is occurring with an electron. Remember, a water wave is created when something is dropped in it from overhead. Therefore wave theory, though providing the most exact answers in all of science, is entirely fictitious.