One of the mistakes that is commonly made when talking about ‘Other Dimensions’ is to straight away to think of things like ‘Parallel Universes or ‘Alternative Realities’ that exist parallel to our own, where whatever happens work differently and separately. Furthermore, the reality of dimensions and the way they work in our Universe is something totally different from this popular characterization.

In simple words, dimensions are only the different facets of what we actually perceive to be our reality. As you’ve probably noticed, we live in a world defined by three spatial dimensions (Length, width and depth) and one dimension of time — It only takes three numbers to pinpoint your physical location at any given moment.

It is widely believed by scientists that beyond these three visible dimensions there may be many more. In fact, the theoretical framework of Superstring Theory is known less formally as “string theory posits that the universe exists in ten different dimensions.

“Sometimes called the Theory of Everything (TOE), because it is a unifying physics theory that reconciles the differences between quantum theory and the theory of relativity to explain the nature of all known forces and matter. According to string theory, at the most microscopic level, everything in the universe is made up of loops of vibrating strings, and apparent particle differences can be attributed to variations of vibration. An object (such as an apple, for example) and a force (such as radiation, for example) can both be broken down into atoms, which can be further broken down into electrons and quarks, which can be, finally, broken down into tiny, vibrating loops of strings.” (1)

Let’s break it down

A one-dimensional world would be like a single bead on a measured thread. You can slide the bead forward and you can slide the bead backward, to find the exact location all you would need is one number. Where’s the bead? It’s at the 8-inch (19-centimeter) mark.

Now let’s upgrade to a two-dimensional world. Think of a flat map, just like playing games such as Chess or Battleship. To find exactly where the ship is on the board all you will need is length and the width. In Battleship, all you have to do is say “E5,” and you know the location is a convergence of the horizontal “E” line and the vertical “5” line.

The third dimension involves depth. Our world factors height (depth) into the equation. While in the game Battleship, to locate the submarine you only need two numbers, however in a real life submarine you would need an additional number to coordinate its depth. It might be just sitting in the harbour, but what if it’s hiding 400 feet (122 meters) beneath the surface?  Of course, in this case you will need the depth to find the submarine.

What about a fourth dimension?

Well, that’s a tricky question. Carl Sagan who was a very popular scientist known for his deep planetary research and interest in the extra-terrestrial topic has been an inspiration for many people all over the globe. I don’t think anyone has ever explained the 4th dimension so beautifully as he does. Hope you enjoy it and please don’t forget to leave a comment below.

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Reference: WhatIs.com (1)