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 Arkani-Hamed, Juan Maldacena, and Roger Penrose.

Season 4, Episode 6 - #CloserToTruth

Closer To Truth host Robert Lawrence Kuhn takes viewers on an intriguing global journey into cutting-edge labs, magnificent libraries, hidden gardens, and revered sanctuaries in order to discover state-of-the-art ideas and make them real and relevant.

Closer to Truth presents the world’s greatest thinkers exploring humanity’s deepest questions. Discover fundamental issues of existence. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers.

#Multiverse #Physics

[CloserToTruthTV]

Closer To Truth is broadcast on PBS stations. You can also watch Closer To Truth online at CloserToTruth.com or on our YouTube channel.

This is Episode 6 of Season 4, first aired on PBS stations in 2009.

[Folkert.Cornelius]

This channel deserves 10 million subscribers. They deal with the most interesting questions in the most accessible way!

[Okla_Soft]

Lawrence always has the best scientists to interview. So well-done!

[geoden]

I've been a follower of Sir Roger Penrose for about 40 years. A great physicist and a superb mathematician. Always straight to the point and always speaks his mind. It was typical of him when he said he was not a fan of extra dimensions, why? ''No evidence'', he said. I have learned much, especially concerning honesty in science from him, there's no shame in being wrong. In short, he epitomises what being a scientist is all about. Live long Sir Roger.

[EUROWEFILMS]

This channel is brain nourishment in its subject, camera work superb, audio exceptional, production & editing, engaging narration, pace & tone & not gabbled like so many.. I'm on board for more of the same, thank you..

[humanoid]

This is correct.The planets, the stars, the universe, and everything else (is) the anatomy of ourselves including (all) life forms.

[BrunoWiebelt]

it burns down to the fundamental question : What is reality? is math reality? conscioousness? ... that's why I love this series

[chatsomil]

We are nowhere closer to the truth than we were before seeing this episode!!

[quantumdecoherence]

A treasure-trove of knowledge. Best series on YouTube.

[charlescrary]

The explanation of space-time by Laurence Krouse at the beginning was the best I've ever heard.

[patriciabafalis]

My favorite subject with my favorite guys! Krauss, Kaku and Nima!! Been following Nima since Particle Fever.

[luciojorgelourenco]

I have an explanation to 4th dimension:
Considering that the regions between two surfaces were a solid with thickness x, area A and volume V. As V=A.x, we have A=V/x
The volume of the first sphere is V1=4/3pR³ and the second is V2=4/3p(R+x)³.
Thus, the volume of the region between the internal and external sphere is V=V2-V1.
V=4/3p(R+x)³- 4/3pR³ implies that V=4/3p[(R+x)³-R³] implies that V= 4/3px(3R²+3Rx+x²).
As A = V/x implies that V/x = 4/3p(3R²+3Rx+x²).
For x too small, we can consider 3Rx=0 and x²=0, thus, we can have A = 4/3p.3R² = 4pR²
Conclusion: The area of the spherical surface is 4pR²
This process can be applied to the calculation of qbits, since one side of the coin there is a cat, the other a cage and the coin rotating we have both sides: the cat in the cage.
See illustrations and more in my channel.

[DrFill-hteh]

I honestly have no idea how this channel doesn't have millions of subscribers from all of this gold material they put out.

[djjfive]

If space and time are recognised as dimensions then why has no one asked what is moving through space and time to make those dimensions exist? I’m presuming here if there was nothing there it’s fair to say it wouldn’t exist?
My answer to this is consciousness is the thing that is moving through space and time...
Could consciousness be a separate dimension that interacts with both time and space, meaning no single one of these could exist without the other two?

[deusexaethera]

6:15 - Oh God. Ask Michio Kaku a direct question and he almost always replies "Let me tell you a story." Dammit, Physics Grandpa, I just want a straight answer!
*Also, his hypothesis that maybe gravity is weaker because it propagates through additional dimensions, which the 3 particle forces don't propagate in, has already been proven incorrect.* Gravity weakens over distance at 1/r^2, where r is the distance from the source of the gravity, just like the 3 particle forces. If gravity propagated through 4 dimensions, it would weaken over distance at 1/r^3; if it propagated through 5 dimensions, it would weaken over distance at 1/r^4; and so on. Anyway, we already know why gravity is weak; gravity is weak because spacetime is very stiff and requires an enormous amount of energy to curve. *Gravity is the manifestation of the curvature of spacetime, not the manifestation of the amount of energy expended to form the curvature.* That's why the gravitational waves emitted by colliding black-holes 100x the mass of the Sun, _which radiate an amount kinetic energy equal to the Sun's mass_ as they spiral in towards each other, still only compress spacetime by 1/1000th the diameter of a proton. You can then go on to ask "why is spacetime so stiff?", and _that_ is a valid question that we don't know the answer to...yet.

[robertdiehl]

Robert, these are fantastic educational programs. Thanks

[japanimated]

I can't sleep... This channel is too good!

[FMDD]

Thank you for inviting Roger Penrose (and traveling to Oxford). I trust the respected Mathematician's perspective on this, as he would have a more honed understanding of the geometries involved. Some physicists working in String Theory would have a vested interest in promoting Higher Dimensions.

[rd]

A million dimensions will.make things a million times easier.

[hjlhbtw]

Great and informative video from heavyweights in the FIELD! Thank you!