Here's why:
* Geiger counters detect ionizing radiation: They work by detecting charged particles (like alpha, beta, or gamma rays) that pass through the detector.
* Each click represents a detected particle: When a particle interacts with the counter's sensitive material, it ionizes the gas inside. This creates a small electrical pulse, which is amplified and registered as a click.
* More clicks = more particles: The faster the clicks, the more particles are being detected within a given time. This indicates a higher concentration of radiation in the environment.
Important to note:
* Different types of radiation have different effects: The clicks don't tell you the type of radiation or its energy level.
* Calibration is crucial: Geiger counters need to be calibrated to give accurate readings.
* Safety: Always follow safety guidelines when using a Geiger counter. If the clicks become very rapid or frequent, it's a sign of high radiation levels and you should move to a safe area.