A plasma globe, also known as a plasma lamp, is a clear glass sphere filled with a mixture of gases, usually neon and argon. When an electric current is passed through the gases, they become ionized and emit light. The color of the light depends on the type of gas used. Plasma globes are often used as decorative items or as nightlights.
Plasma globes were first invented in the 19th century by Nikola Tesla. He used them to study the properties of electricity and magnetism. Today, plasma globes are still used by scientists to study plasma physics. They are also used in a variety of commercial applications, such as in lighting and medical devices.
