eng Science and Education Publishing International Journal of Physics 2333-4576 2023-10-17 11 5 242 252 10.12691/ijp-11-5-3 IJP20231153 article Hui Peng davidpeng1749@yahoo.com 1 James Peng¡¯s Lab, Fremont, CA, USA Young¡¯s double slit experiment is the mystery of the quantum mechanics (Feynman). To explore the mystery, the double slit experiments have been extended to cross double slit experiments. In this article, utilize the fact that each slit of the cross double slit (e.g., one double slit crossing another double slit) is divided into three segments by other two slits crossing, we experimentally show the function of each segment of each slit in producing both non-interference patterns (including Pre-Particle patterns, Particle patterns and Transition Patterns) and the Interference patterns by eliminate the segments respectively and then, compare with the standard patterns of the cross double slit experiment. Although the non-interference patterns of different modified cross double slits are obviously different, the final interference patterns are surprisingly similar. This phenomenon is a new mystery and needs a consistent theoretical interpretation. In the case of applying the interference patterns of the cross double slit diaphragms, this phenomenon allows a bigger tolerance on the defect of making the cross double slit diaphragm. http://pubs.sciepub.com/ijp/11/5/3/ijp-11-5-3.pdf double slit cross double slit non-interference patterns particle patterns pre-particle patterns Transition patterns Interference patterns evolution of patterns convex lens Zone