Which of the following is a disadvantage of using film badges?

• A. They are affected by humidity.
• B. They are easy to read.
• C. They provide real-time monitoring.
• D. They are inexpensive.

Answer: (A)

The statement that film badges are affected by humidity highlights a significant drawback of this method of radiation monitoring. Film badges contain photographic film that can be altered or fogged by environmental conditions, particularly excessive moisture. High humidity can lead to inaccurate exposure readings since moisture can cause the film to darken or degrade, thereby providing misleading results regarding radiation exposure levels. This limitation makes it challenging to rely on film badges in environments where humidity is unpredictable or high.

In contrast, the other options mention characteristics that are not disadvantages. Film badges are indeed easy to read due to the clear visual representation of radiation exposure levels, they do not provide real-time monitoring since the results require development and processing, and they are relatively inexpensive compared to some other dosimetry options. Understanding these factors is crucial for selecting the most appropriate radiation monitoring methods based on specific needs and environmental conditions.