The amount of harm caused by radiation exposure increases with:

The amount of harm caused by radiation exposure is directly related to the absorbed dose of radiation, which is a measure of the energy deposited in a material, such as human tissue, by ionizing radiation. The higher the absorbed dose, the more energy is imparted to the cells, which can lead to biological damage, including DNA damage and increased risk of cancer. This is why the absorbed dose is considered a critical factor in determining the potential health risks associated with radiation exposure.

Other factors such as energy outcomes and tissue density can influence the effects of radiation, but they are not as directly related to the measurement of harm as the absorbed dose. Similarly, reducing the time of exposure to radiation would decrease the total dose received, thus potentially lowering harm, rather than increasing it.