... which was the beginning of the end for the earlier successful Bohr-Sommerfeld quantum theory of the atom. They modeled this research off of the Balmer formula for the case of the outer helium electron and treated the excited helium electron the same as a hydrogen electron. After a very successful three years of study at the University of Munich, Heisenberg prepared for his oral examination for his doctorate. The format had four professors to ask four questions on three ... possible to simultaneously measure velocity and the position of the electron in any given instant. "The more precis...

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• Grade Level: High School