Part 4/8:
Every physical law should obey these transformation rules, which is why tensors assume a central role in our understanding of nature. In the context of general relativity, for instance, the curvature of space-time can be described using the curvature tensor, while the energy motion within that space-time is encapsulated by the energy momentum tensor. Together, these tensors allow physicists to articulate how matter and energy interact with the geometry of space-time.