Einstein's theory of relativity does not consider space and time as completely separate entities but rather as interconnected aspects of a unified fabric known as spacetime. In his theory, space and time are intertwined, and their relationship is described by the geometry of spacetime.
One of the consequences of general relativity is that the presence of mass and energy warps the fabric of spacetime, causing it to curve. This curvature affects the motion of objects, including the passage of time. The concept of time dilation arises from the fact that the curvature of spacetime can cause time to flow differently depending on the strength of the gravitational field or the relative motion of observers.
When an object moves, its motion through space affects its motion through time. This is known as time dilation. As an object's velocity increases, time dilation occurs, and its "rate" of time appears to slow down relative to a stationary observer. This phenomenon has been experimentally confirmed and is an essential aspect of Einstein's theory.
It's important to note that time dilation does not imply a separation of space and time but rather demonstrates their interconnected nature. The effects of motion on time are a consequence of the geometry of spacetime. In relativistic physics, it is the combined concept of spacetime that provides a comprehensive framework for understanding the behavior of matter, energy, and the passage of time in the universe.