What are the key elements of radiation safety?

The key elements of radiation safety focus on managing exposure to ionizing radiation, which is crucial in minimizing health risks. The correct answer highlights three fundamental principles: duration, shielding, and distance.

Duration refers to the length of time a person is exposed to radiation. Reducing the time spent in a radiation area limits an individual's overall exposure, thereby decreasing the potential for harmful effects.

Shielding involves using barriers or materials to absorb or deflect radiation. Different types of radiation require different shielding materials; for example, lead is effective against gamma rays, while plasterboard can provide protection against alpha and beta particles. Effective shielding is essential to reduce exposure to harmful radiation.

Distance is another critical factor in radiation safety. The intensity of radiation decreases with increasing distance from the source (following the inverse square law). By maintaining a greater distance from the source, an individual can significantly lower their exposure.

Together, these principles—duration, shielding, and distance—form the basis of practices designed to protect individuals from the harmful effects of radiation.