In physics, extra dimensions are proposed additional space or time dimensions beyond the (3 + 1) typical of observed spacetime, such as the first attempts based on the Kaluza–Klein theory. Among theories proposing extra dimensions are: * Large extra dimension, mostly motivated by the ADD model, by Nima Arkani-Hamed, Savas Dimopoulos, and Gia Dvali in 1998, in an attempt to solve the hierarchy problem. This theory requires that the fields of the Standard Model are confined to a four-dimensional membrane, while gravity propagates in several additional spatial dimensions that are large compared to the Planck scale. * Warped extra dimensions, such as those proposed by the Randall–Sundrum model (RS), based on warped geometry where the universe is a five-dimensional anti-de Sitter space and the elementary particles except for the graviton are localized on a (3 + 1)-dimensional brane or branes. * Universal extra dimension, proposed and first studied in 2000, assume, at variance with the ADD and RS approaches, that all fields propagate universally in extra dimensions. * Multiple time dimensions, i.e. the possibility that there might be more than one dimension of time, has occasionally been discussed in physics and philosophy, although those models have to deal with the problem of causality. * String theory has one notable feature that requires extra dimensions for mathematical consistency. Spacetime is 26-dimensional in bosonic string theory, 10-dimensional in superstring theory, and 11-dimensional in supergravity theory and M-theory. (Wikipedia).
Chapter 5 of the Dimensions series. See http://www.dimensions-math.org for more information. Press the 'CC' button for subtitles.
From playlist Dimensions
Chapter 1 of the Dimensions series. See http://www.dimensions-math.org for more information. Press the 'CC' button for subtitles.
From playlist Dimensions
Chapter 2 of the Dimensions series. See http://www.dimensions-math.org for more information. Press the 'CC' button for subtitles.
From playlist Dimensions
Chapter 6 of the Dimensions series. See http://www.dimensions-math.org for more information. Press the 'CC' button for subtitles.
From playlist Dimensions
Chapter 4 of the Dimensions series. See http://www.dimensions-math.org for more information. Press the 'CC' button for subtitles.
From playlist Dimensions
Extra Dimensions - Sixty Symbols
We take a look at the mysterious world of extra dimensions. More at http://www.sixtysymbols.com/ Featuring Ed Copeland.
From playlist Ed Copeland - Sixty Symbols
From playlist Dimensions Arabe/Arabic / العربية
From playlist Dimensions Arabe/Arabic / العربية
From playlist Dimensions
Juan M. Maldacena - Are there Extra Dimensions?
Free access to Closer to Truth's library of 5,000 videos: http://bit.ly/2UufzC7 Extra dimensions—beyond length, width, height—seem like the stuff of science fiction. What would extra dimensions be like? Is time the fourth dimension? Does string theory require ten or eleven dimensions? Cou
From playlist Exploring the Multiverse - Closer To Truth - Core Topic
Are there Extra Dimensions? | Episode 406 | Closer To Truth
Extra dimensions -beyond length, width, height- seem the stuff of science fiction. What would extra dimensions be like? Is time the fourth dimension? Could deep reality be so strange? And, anyway, why would we care? Featuring interviews with Lawrence Krauss, Michio Kaku, David Gross, Nima
From playlist Closer To Truth | Season 4
Lisa Randall - Are there Extra Dimensions?
Free access to Closer to Truth's library of 5,000 videos: http://bit.ly/2UufzC7 Extra dimensions—beyond length, width, height—seem like the stuff of science fiction. What would extra dimensions be like? Is time the fourth dimension? Does string theory require ten or eleven dimensions? Cou
From playlist Closer To Truth - Lisa Randall Interviews
Nima Arkani-Hamed - Are there Extra Dimensions?
Free access to Closer to Truth's library of 5,000 videos: http://bit.ly/2UufzC7 Extra dimensions—beyond length, width, height—seem like the stuff of science fiction. What would extra dimensions be like? Is time the fourth dimension? Does string theory require ten or eleven dimensions? Cou
From playlist Exploring the Multiverse - Closer To Truth - Core Topic
Does the Universe have Higher Dimensions? Part 2
Start your free 30-day Audible trial by visiting https://www.audible.com/sabine or text "sabine" to 500 500! String theory predicts additional dimensions of space. How can we observe them? In this video I explain what extra dimensions of space have to do with black holes at the large hadr
From playlist Physics
Hangout with CERN: Extra dimensions (S03E02)
Authors of two of the most cited papers in physics for the past ten years, this hangout features special guest theorists Lisa Randall from Harvard University and Raman Sundrum from University of Maryland, who join CERN physicists to look at how the LHC experiments are investigating extra d
From playlist Hangouts with CERN
Where Are All The Hidden Dimensions?
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From playlist The Entire History of the Universe
Physicist Brian Greene explains superstring theory, the idea that minuscule strands of energy vibrating in 11 dimensions create every particle and force in the universe. View full lesson: http://ed.ted.com/lessons/brian-greene-on-string-theory Talk by Brian Greene.
From playlist Before and After Einstein
From playlist Dimensions Arabe/Arabic / العربية
Where are the Extra Dimensions?
We know that there are four dimensions to our universe. But could there be more? It sounds like science fiction, but it turns out that these extra dimensions could certainly exist and would be very hard to detect under the right circumstances. In fact, theories like string theory actually
From playlist Quantum Mechanics