In the superstring theory that successfully unites gravity and quantum mechanics,the universe must have
A) 11 dimensions (10 spatial and 1 temporal).
B) 4 dimensions (3 spatial and 1 temporal).
C) 9 dimensions (8 spatial and 1 temporal).
D) 6 dimensions (3 spatial and 3 temporal).

Question

Quizplus · Accepted Answer

According to superstring theory, the universe is composed of tiny strings that vibrate at different frequencies in multiple dimensions. In order for the theory to be consistent with gravity and quantum mechanics, it requires the existence of 11 dimensions – 10 spatial dimensions and 1 temporal dimension. The extra spatial dimensions are believed to be compactified (curled up) at scales much smaller than the size of an atom, which is why we don't perceive them in our everyday experience. This idea of extra dimensions is also consistent with other theoretical frameworks such as M-theory and brane-world scenarios.

In the Superstring Theory That Successfully Unites Gravity and Quantum