A plasma globe is a decorative device that creates colorful, glowing streams of plasma. It consists of a glass sphere filled with a low-pressure gas and a central electrode. When electricity is applied to the electrode, it ionizes the gas, producing bright, swirling tendrils of light that follow the movement of your fingers when you touch the glass. These globes are often used for educational purposes to demonstrate principles of electricity and plasma physics. They can also serve as unique nightlights or conversation pieces in homes and offices. The phenomenon is related to electricity, ionization, and gas discharge.