Which of the following is NOT a preferred method for reducing radiation exposure?

The method of working in close proximity to a radiation source is not preferred for reducing radiation exposure. In radiation safety, one of the fundamental principles is to minimize exposure to ionizing radiation.

Increasing distance from the source is strongly encouraged because radiation intensity decreases with increasing distance. This is based on the inverse square law, which indicates that doubling the distance from the source reduces exposure significantly.

Using shielding involves placing a barrier between the radiation source and the individual, which absorbs or deflects the radiation, thereby reducing exposure. This is a well-established method for protecting workers from harmful radiation levels.

Minimizing exposure time is advantageous as well, as less time spent near a radiation source directly correlates to lower radiation dose received. Each of these three methods is designed to enhance safety and protect individuals from unnecessary radiation exposure.

By contrast, approaching or working in close proximity to a radiation source increases exposure and risk, making it counterproductive to radiation safety practices. Therefore, this approach is not recognized as a method for reducing radiation exposure.