The unit of effective dose is the

The unit of effective dose is the

• A. Becquerel
• B. Grayt
• C. Sievert
• D. Graya

Answer: (C)

Effective dose expresses the overall risk from radiation exposure by accounting for both the type of radiation and the sensitivity of different tissues. The unit is the sievert because it translates energy deposited into a biological effect measure, using weighting factors for radiation quality and tissue sensitivity. Absorbed dose, measured in gray, only tells you how much energy is deposited per kilogram and doesn’t reflect how harmful that energy is for living tissue. Becquerel measures activity (disintegrations per second), not dose or risk, so it isn’t applicable here. “Graya” isn’t a recognized unit. In practice, the effective dose combines these factors to produce a risk-based quantity, expressed in sieverts.

Effective dose expresses the overall risk from radiation exposure by accounting for both the type of radiation and the sensitivity of different tissues. The unit is the sievert because it translates energy deposited into a biological effect measure, using weighting factors for radiation quality and tissue sensitivity. Absorbed dose, measured in gray, only tells you how much energy is deposited per kilogram and doesn’t reflect how harmful that energy is for living tissue. Becquerel measures activity (disintegrations per second), not dose or risk, so it isn’t applicable here. “Graya” isn’t a recognized unit. In practice, the effective dose combines these factors to produce a risk-based quantity, expressed in sieverts.