Radiation Safety Practice Exam

What is the relationship between Grays and RAD?

1. 1 Gy = 10 RAD

2. 1 Gy = 100 RAD

3. 1 RAD = 100 Gy

4. 1 RAD = 1 Gy

The correct answer is: 1 Gy = 100 RAD

The correct relationship between Grays and RAD is based on the definitions and conversions of these units of measurement for absorbed radiation dose. A Gray (Gy) is the SI unit for measuring absorbed dose, which quantifies the amount of radiation energy absorbed per kilogram of matter. The RAD (Radiation Absorbed Dose) is an older unit that is now largely replaced by the Gray, but it is still used in some contexts. One RAD is defined as the absorption of 0.01 joules of radiation energy per kilogram of matter. Therefore, when converting from RAD to Gray, the equivalence is that 1 RAD equals 0.01 Gy. Conversely, this means that 1 Gy is equivalent to 100 RAD. Hence, to convert Grays to RAD, you multiply by 100, confirming that 1 Gy indeed equals 100 RAD. This conversion allows professionals in radiation safety and related fields to communicate absorbed doses using standardized units. Understanding this relationship is crucial for effectively managing and assessing radiation exposure risks, particularly in medical and occupational settings.