Final answer:
Humidity, particularly relative humidity, is important in preventing the transmission of sparks in the OR. It breaks down at a lower field strength, requiring a smaller voltage for spark transmission. Maintaining a relative humidity of 30% to 50% indoors is generally recommended.
Step-by-step explanation:
Humidity, specifically relative humidity, plays a crucial role in preventing the transmission of sparks in the operating room (OR). According to the given information, humid air breaks down at a lower field strength, meaning that it requires a smaller voltage to make a spark jump through humid air compared to dry air. The exact percentage of humidity required to prevent spark transmission is not provided in the given information. However, maintaining a relative humidity of 30% to 50% indoors is generally recommended for comfortable and safe conditions.