The diagram below shows a water wave reflected at a plane ... extent into the area beyond the gap. This is diffraction - the spreading out of waves when they go through a gap, or past the edge ...

These were attributed to a diffraction of the cathode rays by the film, the cathode rays behaving as waves of wave-length h/mv according to do Broglie's theory of wave mechanics, and regularities ...

The goal of the current project is to open a new field of research by realizing the first diffraction experiments of atomic matter waves through crystalline 2D membranes like graphene. Such ...