Which method is effective in limiting radiation exposure in the workplace?

Using time, distance, and shielding is a systematic approach to limiting radiation exposure in the workplace and is often referred to as the "Three Principles of Radiation Protection."

Time refers to the duration of exposure to radiation. By minimizing the time spent near a radiation source, the amount of radiation received is proportionately reduced.

Distance involves maximizing the space between personnel and the radiation source. The intensity of radiation decreases significantly with increased distance due to the inverse square law, which states that radiation intensity decreases with the square of the distance from the source.

Shielding refers to the use of physical barriers made from materials that absorb or deflect radiation, such as lead for gamma rays or concrete for neutron radiation. The right shielding can drastically reduce radiation exposure to workers.

Together, these three principles help create a safe environment for workers exposed to radiation, making this approach the most effective method for limiting exposure in the workplace.