What is the effect of distance on radiation exposure?

The correct choice highlights that radiation exposure decreases significantly as the distance from the source of radiation increases. This phenomenon can be understood through the inverse square law, which states that the intensity of radiation is inversely proportional to the square of the distance from the source. In practical terms, this means that if you double the distance from the radiation source, the radiation exposure reduces to one-fourth. This critical concept emphasizes the importance of maintaining a safe distance from radiation sources to minimize exposure to harmful levels.

In contrast, the other options do not accurately reflect the relationship between distance and radiation exposure. For instance, suggesting that exposure remains constant regardless of distance overlooks the inherent nature of radiation dispersion. Additionally, stating that exposure increases significantly with decreasing distance contradicts established safety guidelines in radiography that encourage maximizing distance as a fundamental means of reducing exposure. Lastly, claiming that distance has minimal impact on radiation exposure fails to recognize the significant protective benefits that increased distance can provide in managing radiation risk.