Special article: Theory of General relativity

  General relativity or the general theory of relativity is the geometric theory of gravitation published by Albert Einstein in 1916. It is the current description of gravitation in modern physics. The general relativity showed the connection between the space and time or space-time. It is now the basis of understanding the universal law of gravitation proposed by Sir Isaac Newton. Practically, Albert Einstein was the only person who had understood the relation between space and time and also why planets revolved round the Sun.


We all know that there are three dimensions:

• Length
• Breadth 
• and Height

Space as a typolene

 It was observed that time actually ran slower near heavier bodies and faster in vacuum. This observation led Einstein to propose a whole new theory called the "Theory of General Relativity". Einstein took an interest in time, which is when he said that time was the Fourth dimension. He described that space was the place where all the four dimensions coincided with each other. He described that as a layer of typolene which bent due to mass.  

 This way he said that, just as when heavy objects were put on a layer of typolene, it bent, the same way the space also bent with the heavier mass of the planets. Thus he explained the relation between time and space and gravitation.