What characteristic is unique about radiological materials?

Radiological materials are unique in that they are colorless and odorless, which means that they cannot be detected by human senses without the aid of specialized instruments. This characteristic is significant because it poses a challenge for first responders and the public in identifying their presence without proper detection equipment. Unlike materials that have distinct colors or smells, radiological substances can exist in environments without any noticeable signs, increasing the risk of unintentional exposure or contamination.

The lack of visibility and odor highlights the importance of training and education for those who may encounter these materials, as well as the reliance on technology and safety protocols when handling or being in proximity to potential radiological hazards. Understanding this property assists peace officers and emergency responders in implementing appropriate safety measures to protect themselves and the public.