In radiation dose calculations, what does the radiation weighting factor do?

• A. It multiplies absorbed dose to obtain equivalent dose for a tissue
• B. It reduces absorbed dose by half
• C. It converts dose to air concentration
• D. It adjusts dose for room temperature

Answer: (A)

Different radiation types cause different levels of biological damage, so the weighting factor scales the absorbed dose to reflect that difference. It multiplies the absorbed dose to obtain the equivalent dose for a tissue, giving a biologically meaningful measure in sieverts. In practice, higher-weight factors for more damaging radiation types (like alpha particles) mean a small absorbed dose can translate into a larger equivalent dose, highlighting greater potential harm. A full calculation sums the weighted doses across all radiation types. The other options don’t fit because the weighting factor doesn’t halve the dose, convert to air concentration, or adjust for room temperature.