The PhoTOP: quantum illumination fun with phosphorescent glow tracing the intricate path of a 405nm laser pointer beam on a balanced spinning disk. Let the disk set alone for a few minutes to allow the traces to fade- and repeat again and again to experiment making new patterns. Another piece of mesmerizing interactive kinetic art from the mind of Prof. Ken Brecher. ➡️ Follow the link in my profile for info on where to get a PhoTOP and many other amazing items featured here on @physicsfun #phosp