What type of instrument is a Geiger counter mainly used for?

A Geiger counter is primarily used for measuring low levels of radiation. This instrument is highly sensitive and designed to detect and measure ionizing radiation, including alpha particles, beta particles, and gamma rays, making it useful in monitoring radiation in various environments, especially where levels are not exceedingly high.

The Geiger counter produces audible clicks or visual indicators when radiation is present, allowing for easy monitoring of low radiation levels. This capability makes it a valuable tool in fields like health physics, environmental science, and for public safety, where assessing low-level radiation exposure is crucial.

While the Geiger counter can detect various types of radiation, it is not specifically designed for measuring high radiation levels, which could saturate the detector and reduce its effectiveness. Additionally, it can detect alpha particles among other types, but it is not limited to them, ruling out any options that focus on a narrow aspect of its capabilities.