Radioactive Symbol - International Ionizing Radiation Warning Sign #2216054 (License: Personal Use)

This image displays the internationally recognized ionizing radiation warning symbol, commonly known as the trefoil. It consists of three black, blade-shaped sectors arranged at 120-degree angles around a central circle, set against a vivid yellow background for maximum visibility and contrast. Designed in 1946 at the University of California, Berkeley, the symbol is standardized by ISO 361 and used on containers, equipment, and facilities handling radioactive substances.

This image is typically used in safety documentation, educational materials, regulatory signage, and emergency response guides to communicate radiation risk. It matches user intent for hazard identification, compliance training, or scientific illustration related to nuclear physics, radiology, or occupational safety.