Although they appear to be a three dimensional World but actually this world inside these devices is confined to a flat screen having no depth or height. Third Dimension If we add height or depth to a two dimensional object, it becomes a three dimensional object. A Three dimensional object has non zero volume. A cube or sphere are geometrical examples of three dimensional objects. We live in a three dimensional world where we can move in any direction in space as per our wish.
We are free to move in forward, reverse, up and down directions. Fourth Dimension Time Time is considered the fourth dimension. As I just told you that we live in a three dimensional world where we are free to move in any direction in space. But without the fourth dimension i. The time dimension, no events can take place.
Without time dimension nothing will change in this world. Time is the way for three dimensions to change. It is the time dimension that allows the objects to change their position and location in space. Without time, the whole universe will look like a snapshot for ever. As we are living in a three dimensional world, so we have no control on the fourth dimension, the time. We are forced to move only in the forward direction with time. But a person living in four dimensions will be able to go in any direction in time like past or future.
He will have control over the time dimension as he is a person of four dimensions. So these were the first four dimensions that can be perceived by humans. Now We are going to discuss higher dimensions that we can not perceive, although they exist. So let's start with the fifth dimension Fifth Dimension As I just told you that we can not perceive dimensions that are higher than the fourth dimension because they exist on a subatomic level.
These higher dimensions actually deal with the possibilities. But why we cannot perceive higher dimensions. Actually these dimensions are curled in on themselves in a process known as Compactification. But how these higher dimensions are imperceptible. Let me explain it by giving you a simple example. When we see a rope from large distance, we only observe it's one dimension that is the length. But any insect moving on that rope will also see other dimensions of the rope like its thickness. It will also observe the fine groves and roughness and circumference of the rope that could not be seen by a distant observer.
If a person were living in a world of five dimensions then he would be able to play with time in different ways. He could move either in past or in future. It would also be possible for him to be present at different locations at the same time. He would be able to do many jobs or can have many hobbies at the same time. He could be a doctor, an engineer, a cricketer, a poet and anything else at the same time, as he has full control over the time dimension.
Sixth Dimension Sixth dimension gives more powers to a person living in this dimension. He can not Only move in any direction in time at his will but also can take many forms at the same time just like the quantum world. We know that the quantum world is the world of probabilities, where particles can be present at different places at the same time and can take different forms.
So the sixth dimension gives more flexibility in comparison to the fifth dimension. In The sixth dimension we enter into the world of parallel universes I. The concept of multiverse.
This dimension will allow us to see all possible presents, pasts and futures. But Every Universe present in this multiverse will have the same beginning as that of our universe I. This is the limitation of this dimension. Follow us on Twitter Spacedotcom and on Facebook. All About Space magazine takes you on an awe-inspiring journey through our solar system and beyond, from the amazing technology and spacecraft that enables humanity to venture into orbit, to the complexities of space science.
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Paul received his PhD in Physics from the University of Illinois at Urbana-Champaign in , and spent three years at the Paris Institute of Astrophysics, followed by a research fellowship in Trieste, Italy, His research focuses on many diverse topics, from the emptiest regions of the universe, to the earliest moments of the Big Bang, to the hunt for the first stars.
As an "Agent to the Stars," Paul has passionately engaged the public in science outreach for several years. He is the host of the popular "Ask a Spaceman! View Deal. Paul Sutter. See all comments Admin said:. Riddle me this. The extra dimensions of string theory are themselves supposed to be very very small. But this means those dimensions also have a size relative to the three ordinary spatial dimensions. Not sure that makes a lot of sense, given the definition of "dimension".
Time is a dimension and time does not have any "spatial size". That's what dimension means, a fundamental way of measuring some aspect of existence. But if that measurement itself has a spatial measurement, how fundamental is that.
The other problem with string theory is that it strikes me as basically unverifiable. Not to say that it violates Occam's razor big time.
Plus there doesn't seem to have been a whole lot of progress in this area in the last couple of decades. A lot of highly ingenious mathematical thinking has obviously gone into the whole theory and I think this is a lot of its attraction. Einstein's General Relativity made specific, testable these days predictions.
And so far General Relativity has proven correct every time. None of the new theories can or have been confirmed through experimentation or observation. It's all math at this point, speculation. I don't even know the data being used to justify a theory to explain it. I understand the goal is to unify General Relativity with Quantum Mechanics in a grand theory of everything but the Quantum side has not progressed vey much at all so far. Considering that the Universe as we know it represents only one living entity, there are probably many billions of other Universes that are unknown to us.
Of course our Universe is in contact with them just like we are in contact with other people. We are each a "universe" unto ourselves. Relevant PhysicsForums posts Question about magnetizing and the First law of Thermodynamics 13 hours ago.
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