Non-Diffraction Patterns Evolving to Diffraction Patterns in Classical Wave Experiments --- New Challenge

Abstract

The double slit has been extended to the cross double slits. The universal phenomena that, in classical double slit wave experiments, the nature and the characteristics of the patterns are distance-dependent. The pattern evolutions have been shown. In this article, we extend the single slit to the cross single slit, e.g., single slits crossing single slits, single slit crossing double slit, etc. Then we experimentally show that, within macroscopic distances from diaphragm, patterns are non-diffraction and gradually evolve to the diffraction patterns near the screen in the same single slit/cross single slit experiment. L: mmTilt single slit crossing single slit Single slit crossing single slit 4 single slits crossing Single slit crossing Ring Single slit crossing double slit 0* 10 50 110 1100 Challenge is to interpret consistently the non-diffraction patterns, the diffraction patterns, and the pattern evolution phenomena