What is a common use for Geiger-Muller detectors?

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Geiger-Muller detectors are instruments specifically designed to detect and measure ionizing radiation, which includes alpha particles, beta particles, and gamma rays. Their primary purpose is to identify radioactive contamination in various environments, making them invaluable tools in the fields of nuclear science, health physics, and environmental monitoring.

When a Geiger-Muller detector is exposed to radioactive materials, it produces a measurable electrical pulse in response to the ionization caused by radiation interacting with the detector's gas-filled tube. This feature allows users to assess radiation levels in an area, check for leaks or contamination, and ensure safety in environments where radioactive materials are present.

In contrast, the other options involve tasks that require different types of instruments and methods. Measuring temperature changes would typically involve thermocouples or thermometers, monitoring air quality usually requires specific sensors or analyzers that can detect pollutants or particulates, and testing electrical circuits generally involves multimeters or oscilloscopes. Therefore, the Geiger-Muller detector's unique functionality makes it the appropriate choice for detecting radioactive contamination.