Posted: Aug 03, 2010 10:07 pm
by hackenslash
It's a bit more involved than just the frequency. There are several possible variables. There are open and closed (loops) strings of varying stiffness. Different vibrational patterns, amplitudes and frequencies , on strings of differing stiffness, have different energies, and these give rise to particle masses via E=mc2.

That's it in a nutshell. If I have time tomorrow, I'll post something a bit more substantial about it, as I have some well-read reference sources to hand that explain it in fairly simple terms with some good references for further reading and some peer-reviewed refs.