The amount of harm caused by radiation exposure increases with:

The amount of harm caused by radiation exposure is directly related to the higher absorbed dose. Absorbed dose is a measure of the energy deposited by radiation per unit mass of tissue and is usually expressed in grays (Gy). When the absorbed dose increases, the energy delivered to the tissues also increases, which can lead to greater biological damage. This damage can disrupt cellular structures, including DNA, and cause significant health issues such as cancer or other radiation-induced conditions.

While higher energy outcomes may be dangerous and can affect biological tissues differently, it is the total energy absorbed that is most crucial in determining the extent of harm. Similarly, lower tissue density does not inherently increase the harm; certain types of tissues may be more susceptible to damage. Reducing the time of exposure generally decreases the total dose received, thus minimizing potential harm from radiation. Therefore, focusing on the absorbed dose gives a clearer understanding of the relationship between radiation exposure and its harmful effects.