
Originally Posted by
Vanamali
By taking energy mass equivalence in the same line as the relation between space and time, you are committing a great mistake.
According to Einstein's theory of relativity, mass and energy are inter convertible and time is an integral part of the fabric which forms the universe. What do these two statements mean? By a simple example, I can explain the first statement as "asking for 1kg of sugar is the same as asking for 9x10^16J of sugar. It simply means that a given mass when completely converted gives an energy of c^2 times of it mass.
Lets come to the second statement. If one has a basic knowledge of vector spaces, this is fairly easy to understand. The statement, in simple terms, means that to express any event occurring in this universe, one requires at least four elements and space and time time together form those four elements. In other words, the 3D space and time form the 4D space-time fabric on which the universe rests. Thus the relation between space and time and that between mass and energy are totally different.