Which unit of measurement is commonly used to express radiation dose?

The unit commonly used to express radiation dose is the gray (Gy). This unit quantifies the amount of ionizing radiation energy deposited in a material, typically biological tissue. One gray is defined as the absorption of one joule of radiation energy by one kilogram of matter.

Understanding the gray is essential for radiation safety because it directly relates to the potential biological effects of exposure to radiation. Different types of radiation and exposure scenarios can lead to varying levels of dose, making it important to have a standardized unit that allows for comparison and assessment of risk.

Other units of measurement listed do not relate to radiation dose. For instance, kilograms measure mass, degrees Celsius measure temperature, and liters measure volume. None of these units can adequately quantify the effects of radiation exposure, which is why the gray is the appropriate choice in this context.