Which method is used to measure the received radiation amount?

The method involving radiation badges and dosimeters is a standardized and reliable way to measure the amount of radiation a person has been exposed to. These devices are specifically designed to capture and quantify the radiation dose received over a certain period.

Radiation badges typically contain materials that change in response to radiation exposure, allowing for a reading of the accumulated dose when processed. Dosimeters, which can be more sophisticated and digital, provide real-time data on radiation exposure levels. This practical measurement is crucial in occupational health settings and environments where radiation is present, ensuring that individuals can monitor their exposure and remain within safe limits.

In contrast, while surveys and personal assessments can provide useful information about potential radiation exposure, they may not provide precise measurements. Physical observation does not quantify radiation levels, and theoretical calculations depend on assumptions that may not reflect actual exposures. Thus, using radiation badges and dosimeters offers a definitive, quantifiable method for assessing received radiation, making it the correct choice in this context.