What is the theory of relativity?

The theory of relativity, proposed by Albert Einstein in the early 20th century, is a theory that describes the physical laws that govern the behavior of objects in motion. It is based on the concept of the relativity of motion, which means that the laws of physics are the same for all observers in uniform motion relative to one another.

There are two main parts to the theory of relativity: special relativity and general relativity. Special relativity deals with the laws of physics in the absence of gravity and explains how the speed of light is constant for all observers, regardless of their motion. General relativity, on the other hand, is a theory of gravitation that explains how the force of gravity arises from the curvature of space and time.

The theory of relativity has had a profound impact on our understanding of the universe and has been confirmed by numerous experiments and observations. Its predictions have been tested and verified time and time again, making it one of the most well-established theories in physics.