Which item increases radiation exposure?

The correct answer is that less shielding increases radiation exposure. Shielding is a fundamental principle in radiation protection, where barriers are used to absorb or deflect harmful radiation. When there is less shielding, there is a higher likelihood that radiation can pass through and reach individuals or environmental areas, thereby increasing exposure levels.

In contexts such as medical imaging or radiation therapy, adequate shielding is crucial to protect both patients and healthcare professionals from unnecessary radiation. When shielding materials such as lead or concrete are diminished, the protective barrier's effectiveness is reduced, allowing more radiation to penetrate the area of concern. Conversely, thicker barriers or increased shielding means that more radiation is absorbed or blocked, thereby reducing exposure. Thus, the concept of less shielding leading to increased exposure is grounded in the principles of radiation physics and safety regulations.