What is the Universe expanding into..

[Bonsai]

Should this be *around* a conductor?

//

I don't think so. The field propagates through the conductor at relativistic speeds, but the electrons don't. A sort of analogy (very bad one) would be the wave on a body of water. The water molecules don't travel from where the disturbance is to where you measure it some distance away. The first one at the disturbance moves a bit, bumps the next one etc so the wave propagates across the water very fast compared to the water molecule movement.

 

[Bonsai]

Much as I respect Euler, Cauchy, Gauss, Klein, Germain, Riemann and even Einstein.

We are lost.

We need an extra dimension. I can see the problems of boundary conditions in 2D complex variable.

I struggle with SPIN. Cue the Bonsai 4D Tesseract:



A thing of great loveliness. 🙂

😀


Galu, nice video!

 

[Bonsai]

@TNT sorry, I meant the electric current flowing through the conductor not the field around it

 

[UniQ]

What if it goes in both ways, not just panning out as in the video link below kind of depict a multiverse, but also what if we were able to panning in and look very deep into subatomic stuff and somewhere in there perhaps exists a whole another universe... and so it just goes on and on and on as a Mandelbrot.

Men In Black [1997] Finale - YouTube

I remember as a young guy having a period in my life when I was very fascinated by the universe, at some point my thoughts started to wander away, tried imagining how large could the universe actually be, but then I came to think what if there's a wall that sets the outer boundary of the space we are in, so the next conundrum was "how thick could that wall be..", at that point I found the thoughts so mind boggling and even scary I just had to quit thinking and instead just instill myself to carry on and just appreciate what we have right here and now, on Earth.

Carl Sagan - Pale Blue Dot - YouTube

 

[Galu]

...what if we were able to panning in and look very deep into subatomic stuff and somewhere in there perhaps exists a whole another universe...

That reminds me of the ending of another Sci-Fi movie - The Incredible Shrinking Man.

The Incredible Shrinking Man 1957 Closing Monologue - YouTube

"So close, the infinitesimal and the infinite. But suddenly I knew they were really the two ends of the same concept. The unbelievably small and the unbelievably vast eventually meet, like the closing of a gigantic circle. I looked up, as if somehow I would grasp the heavens, the universe, worlds beyond number. God’s silver tapestry spread across the night. And in that moment I knew the answer to the riddle of the infinite. I had thought in terms of Man’s own limited dimension. I had presumed upon Nature. That existence begins and ends is Man’s conception, not Nature’s."

 

[system7]

I was wondering where you had got to lately, Galu. Ray Milland could have been a decent Physicist. 😀

A decent Platoon of soldiers needs a Joker.

Far as i have got, it takes Seven.

Seven Samurai - Wikipedia

 

[Galu]

A decent Platoon of soldiers needs a Joker.

And a Platoon Officer needs maths! 😀

Engineering Platoon Officer - British Army Jobs

How's your Mid Thigh Pull, Steve? Can you reach 76kg?

 

[benb]

I didn't understand a word of that oldish article on M-Theory. No idea what a "brane" is, 😕

From my understanding (which I completely describe in this post), a brane is a 2-dimensional (or perhaps N-dimensional with N greater than or equal to 2) equivalent of the one-dimensional string from string theory. Brane is short for membrane (something that vibrates like a drum head), which is apparently where the M in M-theory comes from.

Strings and branes apparently exist as low-dimensional entities in all these high-dimensional "theories" (I'd prefer to call them hypotheses).

Misquoting the quote about turtles, it's dimensions all the way down.

 

[Galu]

That description will do for me, benb! 😎

 

[system7]

I am not the World's best Mission Controller. I know my limits. 😀

But if I was in a hurry to solve "What the Universe is expanding into". I would assemble the best team. Dead or Alive, Mathematicians and Physicists.

Naturally, Galu is fired off to the International Space Station first. Jokers first.

Rules are you guys and girls don't come back till you solve it. Put a bit of pressure on.

Next person fired off, IMO, is Carl Friederich Gauss.

Here's what I got so far: And it's starting to look like the 15 song album thread....

01 - Galu- Forum Comedian.
02 - Carl Friederich Gauss - Unique Factorization: Number -163.

 

[Galu]

Since everything is relative, Steve, I regard you as the joker!

Get the white beard and red suit on and I'll fire you into space!

 

[system7]

I'm always game for a laugh myself:

What worries me here is Santa doesn't have a facemask on, So is going to struggle to breathe when he leaves the Atmosphere. And the old principle of "What goes up must come down". Which also worries me. 😱

I was originally going to study Accountancy and Law at Cardiff University. A sound way to make money either way. But somehow was persuaded to go to Bedford College, London and give a bash at Maths and Physics.

We pulled a wicked delaying stunt with Oxbridge examinations to pull it off. How it turned out.

But maybe it is all for the best:

The invisibility of length contraction – Physics World

We just need to crack this SPIN thing. 😀

 

[Galu]

The invisibility of length contraction – Physics World

The Terrell Rotation mentioned in Steve's link, given above, is simulated in video form here:

2015 05 06 Terrell Rotation Video Simulations - YouTube

All of which means that the attached images of the Starship Enterprise's relativistic length contraction are grossly inaccurate!

 

[Just Dave]

It's always interesting, and sometime enlightining, to read this thread!

An obsevation:

Here we are, getting up in the morning, walking around, with ground under our feet.

Yet, we're flying through space, with nothing "under" us.

THAT is so bizzare.

 

[mchambin]

I can't even imagine kangourous hoping down and up in Australia.

 

[Galu]

Talking about 'kangourous', when a boy at the zoo I asked where the 'dangerous' were.

There's no such animal, said my mum.

So I pointed at the sign on the cage - "These animals are dangerous" 😀

 

[N101N]

Some admit and many say it is equal 1...But.

The answer is: 0^0 is undefined.

It is not a matter of personal opinion. It is 1 because it is defined to be 1. By the same token, it could have been fifty.

 

[mchambin]

Defined....by auto proclaimed experts.
0/0 is undefined.

 

[N101N]

It has to be 1 otherwise the whole system would collapse. Many French mathematicians, the one greater than the other, Descartes, Fermat, Fourier, d`Alambert, Lagrange (?), Laplace, Poisson, Cauchy contributed to the development.

 

[mchambin]

Ok, as a great mathematician, I define it to be 0.
Wait !
The universe has not collapsed.
Well, this means I am French, but not a great mathematician, like Gallois.