Heisenberg's Microscope

Heisenberg's microscope exists only as a thought experiment, one that was proposed by Werner Heisenberg, criticized by his mentor Niels Bohr, and subsequently served as the nucleus of some commonly held ideas, and misunderstandings, about Quantum Mechanics. In particular, it provided an argument for the uncertainty principle on the basis of the principles of classical optics.

Read more about Heisenberg's Microscope:  Heisenberg's Argument, Problems With The Argument, Footnotes, Sources