A Geiger-Müller tube is a device used to detect and measure ionizing radiation, such as alpha particles, beta particles, and gamma rays. It consists of a gas-filled tube with electrodes that produce an electrical pulse when radiation interacts with the gas. This pulse is then counted and displayed, providing a measurement of radiation levels. The tube is named after its inventors, Hans Geiger and Walther Müller, who developed it in the early 20th century. Geiger-Müller tubes are commonly used in various fields, including nuclear industry, medical applications, and environmental monitoring, to ensure safety and compliance with radiation standards.