Brief introduction of pendulum

Pendulum, an ancient detection technology, can be traced back to Europe in the15th century. Its early use was mainly to find water sources and veins. Modern usage is influenced by mysticism, but it is more of a divination function. Pendulum detection is a very good and simple way to use our intuition directly, and it can be used as a very powerful diagnostic assistant to guide us. A pendulum is a light weight or crystal connected to a rope or chain, which can swing between the index finger and thumb of the dominant hand.