What is the definition of "radiation exposure"?

Radiation exposure is defined specifically as the amount of ionizing radiation that comes into contact with the body. This definition emphasizes the direct interaction between the radiation and biological tissue, which is crucial for understanding potential health risks and determining safety measures for individuals working in environments where radiation is present.

In practical terms, measuring radiation exposure helps to assess the dose received by a person, which is essential for ensuring compliance with safety regulations and for implementing necessary protective measures. Understanding this concept is vital for radiological workers, as it informs them about the risks associated with their work and the importance of personal dosimetry.

The other options do not accurately define radiation exposure. One focuses on the duration of contact, which does not account for the actual amount of radiation and its biological effects. Another mentions the level of radiation in the environment, overlooking the significance of direct contact with the body. Lastly, the distance from the radiation source is relevant to exposure risk but does not define what exposure itself entails.