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JP: The transverse shield eliminates any overlap from slit A and B and any light paths conflicting with the longitudinal shield.
JP: The transverse shield eliminates any overlap from slit A and B and any light paths conflicting with the longitudinal shield. Thanks for the information on how to upload diagrams and pictures. I will attempt it with this post.Farsight: I am back with some more information on the experiment. Yes, I am using the term quantum theory for the "weird", conceptual stuff, like nonlocality and complementarity, which is not as well established as Quantum Mechanics. Unlike the first experiment I posted, this one requires some precise alignment. The most difficult being for that of the transverse shield. At the short distance from the double slit the interference patterns are to tight to be directly observed ( the demonstration that they are in existence this soon is also a challenge to some prevalent theory requirements). The transverse shield actually consist of two separate overlapping shields which are mounted on a home made device involving two back to back electronic micrometer calipers. The two edges of the compound transverse shield are aligned separately with their respective slit by observing the changes in the interference pattern on the distant screen with only that slit open. It is also important to have all of the slit edges and the transverse shield edges and the plane of the longitudinal shield precisely aligned vertically. Final adjustments can also be made by pattern observation. If any light hits the transverse shield edge it is given away by an asymmetrical staggered edge pattern between one transverse edge and the opposite slit edge or the bowtie pattern between the two transverse edges. In addition to visible observation I also photographed the transverse shield edges, the face of the longitudinal shield, and the dark area it creates on the screen with a long exposure to check for any sign of light. I would also like to mention again that it is the area of the only the two remaining inside single slit peripheral bans that display the double slit spacing. This experiment is set up so that this area represents only slightly divergent or nearly parallel paths. The center intensities which are on more divergent paths do not display the double slit pattern. I originally performed this experiment with the double slit farther from the single slit to reduce the angle of divergence so that the center intensities would be where the double slit appeared. The results where the same but it proved difficult to photograph. The peripheral ban areas allowed for better photographs; which are still not that great. As I mentioned my observations are mostly visual with a digital camera to keep me honest with myself. My equipmet is rudimentary and I am not a trained experimenter. Even if the design of this experiment and my tertiary results to seem to present a challenge to quantum theory it could only change scientific thinking if it is duplicated in an accredited lap, hopefully with equipment to send and detect individual photons, and referred and subjected to peer review. It would be interesting if someone lurking out there has the facilities and duplicates this experiment. I hope this additional information was helpfull and thanks again for you inquiry.
JP: I appreciate your comments and enterest. But first I would like to make sure you understand the experiment. The experiment is actually a combination of a couple experiments or an experiment with more than one phase.