Is there a 4th dimension?

Is there a fourth dimension?
Is there a fourth dimension?

Could time be the 4th Dimension?

All of us are familiar with three dimensions, where we need to have just three numbers to pin-point our location: longitude, latitude, and altitude. In real life, we have three-dimensional objects all around us and we describe them using length, breadth, and height. For thousands of years, people have been dismissing the existence of a 4th dimension considering it as ridiculous.

But in the mid-18th Century, Jean le Rond d’Alembert, the French mathematician pointed out that time could be the 4th dimension. But this suggestion was taken seriously only in the 20th Century when Albert Einstein suggested a new description of the Universe based not simply on location, but on events with each describing four numbers: three for the location that is where they occur, and one for the time that is when they occur.

The idea of thinking the Universe as 4-dimensional ‘space-time’ proved very powerful, and led to a number of insights about the working of the universe and the forces in it. For example, Einstein proposed that gravity is best understood by seeing it as the result of the warping of space-time by matter.

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Such insights led to the investigation of the idea of more dimensions by many theorists– in some theories, as many as six extra dimensions have been proposed that are somehow crumpled up too small to be observed directly. If true, these theories suggest that we might get hints of the extra dimensions from the new subatomic particles at the Large Hadron Collider. However, there’s no sign of them to date.

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