Geiger-Müller counters

A Geiger-Müller counter is a device that detects and measures ionizing radiation, such as radioactive particles or gamma rays. It contains a gas-filled tube with a high-voltage electric field. When radiation enters the tube, it ionizes the gas, creating a sudden electrical pulse. This pulse triggers the counter to register a click or a count, indicating radiation presence. The device is widely used for radiation safety, environmental monitoring, and detecting radioactive materials, providing quick and reliable measurements of radiation levels in various environments.