A Psi wheel is a pyramid-shaped top-like device consisting of a small piece of paper or foil balanced on the tip of a pointed object. Most common explanations for its actions involve air currents caused by the convection of heated air which move the psi wheel. It is also commonly used in attempts to prove the validity of telekinesis.
2 comments:
grazie nax per questa idea. Provvedero' a provarla con gli allievi a scuola.
Alberto levy
Di niente, Albi :)
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