
 Physics 199, Caltech, Spring 2006 (Site not responding. Last check: 20071106) 
  Prerequisites: Classical and quantum physics at the level of Phys 106 and Phys 125. 
  Intro, caveats, philosophies, mathematical physics, fundamental vs emergent, length and energy scales, decoupling of scales, fundamental laws. 
  Physics at the Planck scale, extra dimensions, KaluzaKlein, compact dimensions, gravity in extra dimensions, KK towers and excitations, quantum gravity, quantum divergent amplitudes, effective theories, the string theory solution, rules of string theory, ST in 10 dimensions, superstrings, CalabiYau compactification, entropy of fl holes, problems with realistic string theories, cosmological constant and ST landscape. 
 www.hep.caltech.edu /~ajw/ph199 (658 words) 
