Lichtenberg figure

A Lichtenberg figure is a distinctive branching, tree-like pattern that can be created when high-voltage electrical discharges pass through an insulating medium, such as a dielectric material. These figures are often found in materials like acrylic, glass, and even in certain types of wood, where they appear as beautiful, intricate designs. The phenomenon is named after the German physicist Georg Christoph Lichtenberg, who first studied these patterns in the 18th century.