Colliding ions at just under the speed of light allows researchers to study fundamental particle interactions without violating the laws of physics, as nothing with mass can reach or exceed the speed of light. Attempting to collide particles at light speed or higher is impossible due to the infinite energy required. The choice of speed maximizes energy while maintaining safety and feasibility within current technological limits. This approach enables the exploration of high-energy physics phenomena effectively. Understanding these principles is crucial for advancements in particle physics research.
