In quantum mechanics, the Renninger negative-result experiment is a thought experiment that illustrates some of the difficulties of understanding the nature of wave function collapse and measurement in quantum mechanics. The statement is that a particle need not be detected in order for a quantum measurement to occur, and that the lack of a particle detection can also constitute a measurement. The thought experiment was first posed in 1953 by Mauritius Renninger. It can be understood to be a refinement of the paradox presented in the Mott problem.
Read more about Renninger Negative-result Experiment: The Mott Problem, Renninger's Negative-result Experiment, Common Objections
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