The unit of absorbed dose is expressed in which of the following?

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Multiple Choice

The unit of absorbed dose is expressed in which of the following?

Explanation:
Absorbed dose describes how much energy ionizing radiation deposits in tissue per unit mass. The SI unit for this is the gray, defined as one joule of energy absorbed per kilogram of matter. Historically, the rad was used, with 1 Gy = 100 rad (so 1 rad = 0.01 Gy). The other options mix in units for biological effect (rem, sievert), general energy (joule, watt), or radioactivity (curie, becquerel), which are not the units for absorbed dose. So the correct pairing is rad and gray.

Absorbed dose describes how much energy ionizing radiation deposits in tissue per unit mass. The SI unit for this is the gray, defined as one joule of energy absorbed per kilogram of matter. Historically, the rad was used, with 1 Gy = 100 rad (so 1 rad = 0.01 Gy). The other options mix in units for biological effect (rem, sievert), general energy (joule, watt), or radioactivity (curie, becquerel), which are not the units for absorbed dose. So the correct pairing is rad and gray.

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