3D

by Jeff

Image text: The LINACs in the glasses frames can barely manage one MeV. You should've gone to the screening at CERN.

String theory is a candidate for the theory of microscopic theory of gravity. It also attempts to provide a complete, unified, and consistent description of the fundamental structure of our universe.  String theory is the theory that all points like protons are actually points on a string.

In this comic, our three protagonists go to a movie that purports to be "String Theory: An Expose" Presented in 3D.  So, they put on their 3D glasses, but they glasses do not show them the movie in 3D.  So, they go to Black Hat, the standard xkcd foil, and ask why they couldn't see the 3rd dimension of the movie.  (A typical flat movie is in 2 dimensions (height and width).)

String theory however, had 11 dimensions, 7 of which need to be so tightly rolled up that we cannot detect them.  Hence, the 3rd dimension in the string theory movie was one of those 7 dimensions.  Which is why in the image text, which is a continuation of Black Hat's words, he says that they should have gone to the screening at CERN, where they would have been able to see the 3rd dimension in the movie.  CERN is the European Laboratory for Particle Physics where they have the Large Hadron Collider.

In the image text, a LINAC is a linear particle accelerator.  MeV is multiples of the electron volt, which refers to 1,000,000 eV.