## Friday, October 21, 2005

### News on string theory in the media

How faithful picture of string theory do the media offer? Let's look at this sample from the last 48 hours or so. ;-)

• "EinsteinFest" at the Perimeter Institute attracts 18,000 people
• Vanishing Netgear rebate proves additional dimensions predicted by string theory
• India Daily has another experimental proof of extra dimensions
• India Daily had yet another article "String Theory" one day earlier
• Brian Regan's brain exploded when he watched string theory on PBS
• It is argued that the rest of the show "Girlfriends" looks like string theory
• Emerson Quartet that became famous for joining Brian Greene plans to perform Mendelssohn and Mozart
• Steel string theory is going to perform in Ohio
• Alan Lightman thinks that artists are like scientists because they also like string theory
• Ancient neutrinos described in a crackpot paper may prove either loop quantum gravity, string theory, or a required diet for Schrödinger's cat
• Computer simulations indicate that type IIA vacua with orientifolds of six-tori produce one MSSM-like model per one billion of backgrounds

1. Hi Luboš,

Great news about extra dimensions being discovered in India! This makes a fool of me, I had given up on extra dimensions.

One thing I want to ask here is this. In general relativity, Feynman pointed out that the contraction term physically means a 1.5 mm compression of the earth's radius, without affecting the circumference (he doesn't give a derivation, but I've done that on my home page, available from my blog - my home page was a top hit for "mechanism gravity" on Google for months, but they suppressed it when I used the fact of its popularity as an argument for Wikipedia linking to it for its "gravity" page).

Anyway, in GR there is a radial contraction which Feynman's handwaving lectures - backed by my rigorous math, show is (1/3)MG/c^2 = 1.5 mm for earth's mass.

This means that the fourth dimension is really a mathematical convenience for the purpose of accounting for the variation of Pi which occurs when gravity (as spacetime fabric pressure) compresses the radial distance around mass while leaving the transverse distance (circumference) unchanged.

Pi = circumference/diameter.

The 1.5 mm shrinkage of earth's radius this increases Pi beyond its normal value of 3.14159265...

This property of the spacetime fabric scares the hell out of me.

Pi is a mathematical constant, but general relativity can increase it!

Is the universe really mathematical? is God a pure mathematician? Is the fourth dimension a reality or just a mathematical convenience? I think the role of the 4th dimension is to preserve the value of Pi at the pure mathematical value, not allowing an increase due to radial compression. However, the radial compression is equivalent by Einstein's equivalence principle to the Lorentz compression, indicating the reality of a Higgs field which causes compression in the direction of motion of moving objects.

Do you have any comments?

I think the traditional teaching of GR is wrong, and is like saying that latitude "curves" space to cause the Coriolis force. This is what you would have to do if you denied the earth's absolute rotation. But because the rotation of the earth is real, there is a mechanism for the Coriolis force, which causes the spin of tornadoes and hurricanes.

The math of GR is OK, but needs a physical mechanism to understand it, see my site. This directly affects the understanding of the 4th dimension, which is the only additional dimension widely accepted as being real. Therefore you should really look into it.

Best wishes,
Nigel

2. Dear Lumos,

Just in case you are "hard of understanding" let me simplify a bit. The curvature of spacetime by another dimension would keep Pi at the normal value 3.14159265...