Which type of hazard is characterized by a flashing light and may indicate a reactive chemical?

The concept of a flashing light indicating a potential reactive chemical aligns closely with the characteristics of a physical hazard. Physical hazards often involve the properties and behaviors of substances that may lead to dangerous situations, such as reactivity. The flashing light can serve as a visual warning, signaling that a chemical reaction could be occurring or is possible, particularly with substances that are reactive under certain conditions.

Reactive chemicals are those that can undergo rapid or violent reactions in the presence of other substances, heat, or even atmospheric changes. The presence of a visual alert, like a flashing light, serves to communicate an immediate risk that requires caution and awareness during hazardous materials operations.

In contrast, thermal hazards would relate to heat exposure or extremes, electrical hazards to risks from electrical sources, and radioactive hazards to emissions from unstable atomic nuclei. These categories do not specifically suggest a reactive chemical that would present a visual warning system like a flashing light. Thus, identifying a physical hazard with a flashing light indicates an awareness of potential reactivity, supporting the determination of it being the correct response.