What is the formula used to calculate absorbed dose?

The absorbed dose is a measure of the energy deposited in a material or tissue by ionizing radiation and is calculated using the formula where the energy absorbed is divided by the mass of the material that absorbs the energy. This formula allows for the determination of the energy per unit mass that a substance has received from radiation, which is crucial for assessing potential biological effects and making medical treatment decisions.

The absorbed dose is typically expressed in grays (Gy), where one gray is equivalent to one joule of energy absorbed per kilogram of matter. This relationship is fundamental in fields like radiology and radiation therapy, as it helps quantify the extent of radiation exposure.

In contrast, other options do not correctly represent the concept of absorbed dose. For instance, energy absorbed divided by time relates to the concept of power rather than dose, while multiplying energy by mass does not yield a meaningful measure of radiation absorbed per unit mass. Lastly, adding energy absorbed and mass does not align with the principles of dose calculations either.