Its all about Physics.

  Spacetime : 49bf13bddad5006e08d91c71e61... by vkphy Introduction: Spacetime is a mathematical representation of physics that unifies the one dimension of time and the three dimensions of space into a single four-dimensional manifold. To understand relativistic effects, such as why different observers view events differently depending on where and when they occur, spacetime diagrams can be utilised.   Spacetime The three-dimensional geometry of the universe, or its spatial manifestation in terms of coordinates, distances, and directions, was thought to be independent of one-dimensional time until the 20th century. As part of his theory of relativity, the scientist Albert Einstein contributed to the development of the concept of spacetime.Before his groundbreaking work, scientists had two different theories to explain physical phenomena: James Clerk Maxwell's electromagnetic models defined the characteristics of light, while Isaac Newton's laws of physics described the moti...