Radiation exposure is measured in which of the following units?

The measurement of radiation exposure is expressed in Grays (Gy), which quantify the amount of ionizing radiation absorbed by a material, typically biological tissue. One Gray is defined as the absorption of one joule of radiation energy per kilogram of matter. This unit is particularly relevant in the fields of radiology and radiation therapy, as it helps healthcare professionals assess the potential impact of radiation on patients and to ensure that exposure is kept within safe limits. Understanding radiation dose is crucial for both treatment efficacy and minimizing risks of adverse effects from radiation exposure.

Liters are a unit of volume and do not relate to radiation measurement. Joules measure energy but are not specific to the biological effects of radiation, while meters measure distance and are also unrelated to radiation exposure. Thus, Grays stands out as the appropriate choice for this context.