What is the rattle?

Rattleback, also known as wobblestone or and Celt , is a type of peak that has a preferred direction to turn. This direction varies depending on a specific rattle and can either be clockwise or counterclockwise. If it spins in a non -profit direction, the upper part stops and begins to spin in a preferred direction. Rattlebacks are ancient toys that have fascinated people for thousands of years mainly because of the obvious defiance of physical laws. Ancient rattlebacks were usually made of stone, but today they can be made of almost any hard material, including plastic, wood and glass. One can even be made of packed bump sticks. Rattleback works because of some asymmetry, either in the base itself or in the form of asymmetric weights connected to the top of The Base. This asymmetry causes a rattle to become unstable when it spins in one direction.

Regardless of the direction in which Rattleback turns - whether it's "right" or "bad" - it spins in a slightly unstable way. It varies that it is spinning in a non -profit direction and begins to spin in a preferred direction; But even if it turns the preferred direction, it will rotate well for a while, fluctuations and stop spinning. Wooden or stone rattles usually slow down due to friction before becoming unstable in the preferred direction of spinning. However, glass rattles can switch the instructions several times before slowing.

Rattlebacks seem mysterious because people expect something that spins in one direction will continue in the same direction until some power stops it. For this reason, Rattlebacks have sometimes been considered supernatural and used as a means of divination. Many physical papers have been published on the topic of Rattleback and most people today recognize that it is simply a toy and that its apparently unusual movement has a rational explanation. However, RattleBacks will continue to entertain many with their surprising reverse movement of the middle spin.