Which three principles are used to reduce exposure to radiation?

The three principles used to reduce exposure to radiation are Time, Distance, and Shielding. These principles are foundational in radiological safety and are widely recognized for their effectiveness in minimizing exposure to harmful radiation.

Time refers to the duration of exposure to radiation; the less time spent near a radiation source, the lower the dose received. This principle is crucial in scenarios where individuals might be exposed to radiation, as reducing time directly correlates with a decrease in exposure levels.

Distance emphasizes the importance of increasing the physical space between the radiation source and the person. The intensity of radiation decreases significantly with distance due to the inverse square law, which states that the radiation intensity is inversely proportional to the square of the distance from the source. Therefore, even a small increase in distance can lead to a substantial reduction in exposure.

Shielding involves using materials that absorb or block radiation, thereby protecting individuals from harmful rays. Different types of radiation require different shielding materials (e.g., lead for X-rays and gamma rays, while plastic or glass can be suitable for beta particles). Proper shielding can significantly reduce exposure to radiation.

While the other options may include valid concepts related to radiological safety, they do not represent the main principles used to minimize radiation exposure as effectively as Time,