Which scenario best demonstrates the inverse square law in radiation safety?

The selected scenario illustrates the inverse square law effectively because it highlights how increasing the distance from a radiation source significantly reduces exposure. The inverse square law states that the intensity of radiation decreases with the square of the distance from the source. Therefore, as the worker uses a remote-controlled device, they can maintain a safer distance from the radioactive materials. This effectively minimizes their exposure to radiation, demonstrating a key principle of radiation safety management.

In contrast, other scenarios do not illustrate the inverse square law as clearly. The first option discusses time spent near a source without directly addressing distance; although time management is important, it does not demonstrate the mathematical relationship defined by the inverse square law. Wearing protective garments like lead aprons can reduce radiation exposure but does not leverage the distance factor. Finally, the last scenario actually contradicts the application of the inverse square law by proposing to increase the source's intensity, which could lead to higher exposure rather than illustrating how distance mitigates risk.