Different tools have been developed by physicists to detect particle interactions, including one tool called a cloud chamber. A cloud chamber is a device that uses a supersaturated alcohol vapor to outline the paths of subatomic particles. It requires an adequate source of radiation, either background radiation or a radioactive element, that is placed inside the chamber and allowed to decay. The particles emitted from the decaying element form tracks, as a result of the condensation of the supersaturated alcohol.
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