Which protective measure can help prevent unintended exposure to lasers?

Using warning signs and barriers is a crucial protective measure to prevent unintended exposure to lasers. These devices serve as effective means of communication to indicate the presence of laser hazards and to restrict access to areas where laser operations are taking place. Warning signs alert individuals to the risk of laser exposure, thereby promoting awareness and caution, while barriers provide a physical separation, limiting access to potentially hazardous zones. This dual approach significantly reduces the chances of accidental exposure by making sure that unauthorized personnel are kept out of harmful areas and are warned of potential dangers.

In contrast, running experiments with high power increases the potential for hazardous situations, while wearing reflective clothing does not adequately mitigate exposure risks. Open windows for ventilation may not provide sufficient safety, particularly in high-risk environments where laser beams can escape control, potentially exposing individuals outside the area. Thus, warning signs and barriers represent a systematic approach to enhance safety and ensure that laser usage is conducted responsibly and with care.