This part of Physics deals with movement at very high speed, i.e., near or comparable to the speed of light (indicated by
It covers, mainly, the work of Albert Einstein that divided it in two parts:
- Special Relativity: it is an extension of the laws of cinematic to include the effect of moving at high speed;
- General Relativity: it is an extension of Newtonian Mechanics (and Gravitation).
In Relativity it is considered the fact that the speed of light cannot be exceeded; even if the source of light is moving with a certain speed, light itself, will always move at
A person moving with high speed will measure a certain time between two events. Another person moving at different speed relative to the first will measure a different time!!!