SPECIAL THEORY OF RELATIVITY INTRODUCTION Let’s start with the question-what is relativity ? It is the concept in physics according to which measurements change when considered by observers in various states of motion. The main credit of relativity theory is given to great scientist, Albert Einstein. In the beginning of relativity theory i.e. in classical physics, it was assumed that all observers anywhere in universe would obtain identical measurements of space and time intervals. But, according to relativity theory, this is not so; all measurements depend upon the relative motions of the observer and the object observed. Also the modern theory is an extension of the simpler Galilean or Newtonian concept of relativity, which holds that the laws of mechanics are the same in one system as in another system in uniform motion relative to it. General relativity was invented by Einstein as a modification of his earlier theory of special relativity, which is the theory of the behaviour of...
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