mechanical analysis, an electron has some probability of showing up at any point in the universe, though the probability that it will be far from where one expects becomes very low at great distances from the neighborhood in which it is originally found. In other words, the "position" of an electron can only be stated in terms of a probability distribution, as can predictions of where it may move. See also Atom localization Quantum mechanics Basics of quantum mechanics Interpretation of quantum mechanics Philosophical interpretation of classical physics Schrödinger's cat Uncertainty principle Quantum field theory Electromagnetic radiation References Sources External links History of Heisenberg's Microscope Lectures on Heisenberg's Microscope Thought experiments in quantum mechanics Werner Heisenberg