What equipment is commonly used to monitor radiation levels in the environment?

• A. Geiger counter
• B. Radiation therapy machine
• C. X-ray machine
• D. Ultrasound device

Answer: (A)

The Geiger counter is a widely used instrument for measuring ionizing radiation in the environment. It detects and quantifies radiation levels, providing immediate feedback on radiation exposure. This device is particularly effective due to its sensitivity to various types of radiation, including alpha particles, beta particles, and gamma rays. The Geiger counter is often employed in a range of situations, from monitoring environmental radiation to ensuring safety in workplaces where radioactive materials are present.

In contrast, the other options serve different functions. A radiation therapy machine is utilized for treating cancer, targeting specific areas of the body with high doses of radiation. An X-ray machine is designed primarily for imaging purposes to view the internal structures of the body. Lastly, an ultrasound device uses sound waves for imaging and does not involve radiation at all. Each of these devices has a distinct purpose and is not suited for the continuous monitoring of environmental radiation levels as effectively as the Geiger counter.