Question

what is string theory explain in brief

Answer 1

string theory. (strĭng) A theory in physics that views subatomic particles as string-like objects floating in space-time rather than as point-like objects. Space-time in string theory can have up to nine dimensions of space, plus the dimension of time. The American Heritage® Student Science Dictionary, Second Edition.

Answer 2

A theory with 26 dimensions, objects with imaginary mass that could ruin the very physics of our universe, and the notion that particles and forces are only excitations of vibrational modes—string theory, and all that it entails, is mind-boggling. However, how can it possibly work? After all, we only experience four dimensions (three of space and one of time), so 26 dimensions is 22 too many.