Quantum Radiology Bankstown. A simplified version of this considered experiment, attributed to David Bohm, considers the decay of a particle known as the pi meson. When this particle decays, it makes an electron as well as a positron which have opposite spin and are moving from each other. For example, https://mondaydirectory.com/listings12760045/quantum-health-the-5-second-trick-for-quantum-theory