emptiness in physics

In physics, emptiness—often called a vacuum—is not truly empty but virtually free of matter. It’s a space with very low particle density, where atoms and molecules are scarce. Interestingly, quantum physics reveals that even a perfect vacuum has fleeting energy fluctuations and virtual particles popping in and out of existence. This indicates that emptiness is dynamic and complex, not simply empty space. So, while a vacuum appears empty, it’s a backdrop for fundamental quantum effects and the universe’s fabric, blending simplicity with profound complexity.