Heisenberg's microscope
Thought experiment establishing quantum ideas / From Wikipedia, the free encyclopedia
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Heisenberg's microscope is a thought experiment proposed by Werner Heisenberg that has served as the nucleus of some commonly held ideas about quantum mechanics. In particular, it provides an argument for the uncertainty principle on the basis of the principles of classical optics.
The concept was criticized[clarification needed] by Heisenberg's mentor Niels Bohr, and theoretical and experimental developments have suggested that Heisenberg's intuitive explanation[clarification needed] of his mathematical result might be misleading.[1][2] While the act of measurement does lead to uncertainty, the loss of precision is less than that predicted by Heisenberg's argument when measured at the level of an individual state. The formal mathematical result remains valid, however, and the original intuitive argument has also been vindicated mathematically when the notion of disturbance[clarification needed] is expanded to be independent of any specific state.[3][4]