rich1.0RedTailHawk (npub1z4…6zpx6)https://yabu.me/npub1z4y76jl8r5d8p63defzedngv2nrp46jgt3hyuk5v533htrycm49q66zpx6njumphttps://yabu.meIt's testing EMF waves for their magnetic and electrical components, comparing wave amplitude to period which determines the angle at which the wave crosses the center line. That angle can be calibrated for if you design the pendulum correctly. There's ample science behind this. The progenitor of the practice has 3 books available, but sure, throw stones like some asshole before asking any questions to dig deeper. It's much easier just to throw rocks than humble yourself to inquire what else there is to know here...you know...unknown unknowns?