Many describe the double-slit experiment in a more mysterious way, that necessary.
The double-slit experiment, sometimes called Young 's experiment (after Young's interference experiment ), is a demonstration that matter and energy can display characteristics of both waves and particles , and demonstrates the fundamentally probabilistic nature of quantum mechanical phenomena. In the basic version of this experiment, a coherent light source such as a laser beam illuminates a thin plate pierced by two parallel slits, and the light passing through the slits is observed on a screen behind the plate.
Quantum entanglement occurs when particles such as photons , electrons , molecules as large as buckyballs , [ 1 ] [ 2 ] and even small diamonds [ 3 ] [ 4 ] interact physically and then become separated; the type of interaction is such that each resulting member of a pair is properly described by the same quantum mechanical description ( state ), which is indefinite in terms of important factors such as position , [ 5 ] momentum , spin , polarization , etc.
Bell's theorem is a no-go theorem famous for drawing an important line in the sand between quantum mechanics (QM) and the world as we know it classically. In its simplest form, Bell's theorem states: [ 1 ] No physical theory of local hidden variables can ever reproduce all of the predictions of quantum mechanics.