An event in physics is defined by four coordinates (x, y, z, t) and does not possess length or duration in the traditional sense. The confusion arises from equating an event with a physical object, which requires dimensions greater than zero. When an event has a length L of 0, it indicates that it occurs at a single point in space and time, rather than spanning a distance. The discussion clarifies that while events can be described in terms of their position and time, they do not have physical dimensions like length or duration. Ultimately, the distinction between events and physical objects is crucial for understanding this concept.