Which unit is used to describe effective dose limits?

Which unit is used to describe effective dose limits?

• A. Becquerel
• B. Gyt
• C. Sievert
• D. Gya

Answer: (C)

Effective dose limits use a unit that reflects the potential harm to tissue, not just the amount of radiation delivered. An absorbed dose in Gray tells you how much energy is deposited in matter, but it doesn’t account for how different radiation types affect biological tissue or how sensitive different tissues are. The Sievert combines those factors with weighting for radiation type and tissue sensitivity, giving a measure of risk. That’s why regulatory dose limits are stated in Sieverts (often millisieverts for practical values). The other units describe different things—Becquerel is about radioactive decay rate, Gray is about energy deposited without biological weighting, and the remaining unit isn’t used for dose limits—so Sievert is the correct choice.

Effective dose limits use a unit that reflects the potential harm to tissue, not just the amount of radiation delivered. An absorbed dose in Gray tells you how much energy is deposited in matter, but it doesn’t account for how different radiation types affect biological tissue or how sensitive different tissues are. The Sievert combines those factors with weighting for radiation type and tissue sensitivity, giving a measure of risk. That’s why regulatory dose limits are stated in Sieverts (often millisieverts for practical values). The other units describe different things—Becquerel is about radioactive decay rate, Gray is about energy deposited without biological weighting, and the remaining unit isn’t used for dose limits—so Sievert is the correct choice.