Hayat Ashraf

Relativity is a branch of physics that deals with the behavior of objects moving at high speeds or in the presence of strong gravitational fields. It is described by two fundamental theories:  1. Special Theory of Relativity: The Special Theory of Relativity, formulated by Albert Einstein in 1905, introduces a new understanding of space and time. It is based on two postulates:    - The Principle of Relativity: The laws of physics are the same in all inertial reference frames. In other words, the laws of physics appear the same to observers in relative motion with constant velocity.    - The Speed of Light Postulate: The speed of light in a vacuum is constant and independent of the motion of the source or the observer. This constant speed of light, denoted by 'c,' is approximately 299,792 kilometers per second.    The Special Theory of Relativity predicts several phenomena, including time dilation, length contraction, and the equivalence of mass and ene...