Which of the following is a factor that determines the radiation exposure level?

The intensity of radiation exposure is significantly influenced by the location of an individual in relation to the source of radiation. When someone is closer to a radiation source, they are subject to higher levels of exposure due to the inverse square law, which states that as the distance from the source of radiation increases, the intensity of radiation decreases exponentially. This means that even small changes in proximity can lead to substantial differences in exposure levels. Location is thus a critical factor in determining how much radiation an individual receives.

While the intensity of light, current weather conditions, and geological structures can play roles in environmental contexts, they do not directly relate to the quantifiable measure of radiation exposure in the same manner as proximity to the source does. This emphasis on distance illustrates why positioning relative to the radiation source is essential in assessing exposure risk.