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==Extra Dimensions in Physics==

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Some models in high-energy physics postulate that space-time has more than 4-dimensions. For example, in the Kaluza-Klein model, a point is specified by a point in 4D-spacetime, plus a point on a circle attached to that point in 4D-spacetime. Though this model is currently out of favor, it illustrates the basic flavor of additional spatial dimensions in the other models.

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Some models in high-energy physics postulate that space-time has more than 4-dimensions. For example, in the Kaluza-Klein model, a point is specified by a point in 4D-spacetime, plus a point on a circle attached to that point in 4D-spacetime. Though this model is currently out of favor, it illustrates the basic flavor of additional spatial dimensions in the other models; for example, in string theory.

[[Category:Mathematics]][[Category:Physics]]

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