Which of the following is a type of ionization chamber?

The Geiger (GM) Counter is indeed classified as a type of ionization chamber. It operates by detecting ionizing radiation through the ionization of gas within a sealed chamber. When radiation enters the chamber, it ionizes the gas molecules, creating charged particles. These ions are then collected by electrodes, leading to an electrical pulse that signifies the presence of radiation.

This characteristic of operating by collecting the charges produced in the gas makes the Geiger counter a prevalent tool in radiation detection, particularly for measuring beta and gamma radiation. Its ability to provide a simple, audible click or a visual display in response to radiation makes it user-friendly and widely utilized in various settings, including safety monitoring and educational use.

Other answers represent different types of radiation detection technologies that do not function as ionization chambers. For example, a thermographic scanner detects infrared radiation and is used for thermal imaging rather than for measuring ionization events. A photomultiplier tube is used in conjunction with scintillation detectors to amplify signals but does not directly measure ionization. Scintillation detectors use a different principle, utilizing scintillating materials that emit light upon interaction with ionizing radiation, which is then detected by photomultiplier tubes to provide a readout.

Understanding