Physical double gap experiment for the investigation of the electrons properties, thereby characterized, that one or more electron guns individual electrons or electrons of the groups is not through the gaps firing, but preferably on the surface between the two columns, and / or that these electrons on the planes of the two columns either be absorbed, or in some other suitable manner at the side of the columns are reflected, and in that as a result these electrons directly at the gap at the actual passage through the gaps are prevented from.
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