EXTRA - DIMENSION 

 Surely the title seems weird; it is certainly not a science fiction but just a leisure-time chat on space-time-dimension-n-universe!~



Most of us (till recently, including the renowned physicists) have an innate concept of three dimensional space constituting the three familiar dimensions-‘up-down’, ‘left-right’ and ‘forward-backward’, scientifically interpreted as X-, Y- and Z-axes!~ It was Einstein who had put forward the occurrence of ‘Time’ dimension!~ But recently the scientists are struggling to find experimental evidences supporting the existence of ‘extra-dimensions’!~These as-yet-unseen dimensions could be flat (i.e. 2-dimensional only) or could be warped (like reflections in a fun-house mirror) or might be tiny as quarks-n-gluons or as big as another universe!~ We don’t have, to be precise, we cannot have any idea about the picture of these extra dimensions in space mainly because we are too much accustomed, born and built in a space involving 3 dimensions!~

Though it is really hard to explain, but I will try my level best to depict a fabulous thing which I find the most interesting about extra-dimensions!~ 

Let there be a universe named ‘ABC’ which has only two dimensions!~ Then the inhabitants of that world cannot perceive any 3-D object even though the dimension does exist!~ Now if a spherical object passes through their universe they would surely fail to recognize it as a sphere but they will see a disc (2-D interpretation of a sphere) passing by!~

This is just the simplest example!~ We may have a person sitting right in front of us though we cannot detect him just because he resides in another dimension (thinking about ghosts?) !~Our senses register only three dimensions, so an infinite extra dimension might sound incredible!~ But an infinite unseen dimension and parallel universes within it, each with different dimensions, are some of the bizarre possibilities which might exist in our cosmos!~

The most astonishing fact of the story is that these extra dimensions are perfectly undetectable!~ The most acceptable of all reasons behind this is the warping caused due to space-time curve!~ Einstein’s theory of relativity tells us that energy and matter curve space and time!~ So it was assumed that space and time could be so extremely warped that even an infinite extra dimension could exist but escape detection!~

The detection of these dimensions can solve some of the greatest mysteries of physics chief among which is why gravitational force is so weak in some cases; for example when we pick up a ball; we counter the gravitational force of the entire earth but it turns out to be so feeble!~ It may also lead to the invention of innumerable other heavenly bodies and other mysterious phenomena that are part of that unknown world!~

This is why Einstein once told that it was impossible for us to solve all the mysteries of this infinite universe because we ourselves are a part of this incredibility!!!!!