If Extra Dimensions Are Available, They Ought To Be Really, Tiny

What and where are extra dimensions?. String theory, the current theoretical framework that we use to explain the universe, does not fit into our idea of a four-dimensional world.

String theory states that quarks, which are the building blocks of subatomic particles like protons and neutrons, are made up of tiny strings that vibrate at different frequencies to give them their unique properties. The reason string theory doesn’t fit our three spatial dimensions is that the strings, in theory, don’t have enough room to wiggle and bring about the unique properties of quarks. Therefore, in recent years, scientists have suggested a very intriguing idea: there might actually be more than four dimensions.


Video advice: Exploring other dimensions – Alex Rosenthal and George Zaidan

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Theories of the Universe: The Second Requirement, Extra Dimensions

The Second Requirement, Extra DimensionsTheories of the UniverseIt’s All Held Together with StringsA Brief History of String TheoryThe Important PartThe Second Requirement, Extra DimensionsHow Many Dimensions Are There? Okay, you now have one of the most important parts of string theory under your belt.

The Second Requirement, Extra Dimensions

The Second Requirement, Extra Dimensions Okay, you now have one of the most important parts of string theory under your belt. But you’re not off the hook yet. There is another important point we need to discuss and this point is equally significant. (I know, you thought I said the last section was the most important. It is, but so is this section. ) We’ll start by stating exactly what this other requirement is and then work backward from there. As in SUSY, extra dimensions are required for SST. Cosmonotes The difficulty in describing the extra dimensions that are needed in SST lies in the ability to express their geometrical form. These extra dimensions are not just crumpled up any old way. In 1984, four physicists showed that the extra six dimensions needed can be described using what’s called a Calabi-Yau shape. The name is derived from the two mathematicians, Eugenio Calabi and Shing-Tung Yau that developed the model. The closest I can come in telling you what it looks like is that it resembles the famous ?


Video advice: Do Space and Time Really Exist?

We think of space and time as the structure of the universe. Yet Einstein argued ‘space and time are modes by which we think and not conditions in which we live’. Philosophers too – Kant and Heidegger no less – saw space and time as the framework of thought not the world. So are space and time just a human fantasy? Huw Price, Julian Barbour, Michela Massimi debate the structure of reality


Video advice: If higher dimensions exist, they aren’t what you think

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[FAQ]

Do large extra dimensions exist?

In particle physics and string theory (M-theory), the ADD model, also known as the model with large extra dimensions (LED), is a model framework that attempts to solve the hierarchy problem.

How small are extra dimensions?

If extra dimensions of space exist, they must be smaller than about half the width of a human hair, according to new measurements of the strength of gravity at short distances. ... "Testing the inverse square law (meaning Newton's law of gravity) is the bombproof way to look for extra dimensions."

Are extra dimensions proven?

University of Chicago astronomers found no evidence for extra spatial dimensions to the universe based on the gravitational wave data. ... Two of these are dark matter, one of the basic ingredients of the universe; and dark energy, the mysterious force that's making the universe expand faster over time.

What does it mean for a dimension to be small?

"Small" means that the extra dimensions form a compact space (you can think of it as a space with finite volume). An example would be the four-dimensional space that we know and love (3 space + 1 time) plus an additional fifth dimension as a circle.

Can a wormhole exist?

Einstein's theory of general relativity mathematically predicts the existence of wormholes, but none have been discovered to date. A negative mass wormhole might be spotted by the way its gravity affects light that passes by.

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