Particle physicists use this idea of hidden dimensions as one possible solution, but is there any way to validate it?
It turns out that some paradoxes of particle physics can be investigated in surprisingly direct ways. In this case, measuring the force of gravity extremely carefully with a tabletop apparatus could reveal the existence of hidden dimensions.
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The astonishing possibility is that, at very short distances, gravity may no longer follow Newton's Law (force of gravity varies inversely with distance squared.) The actual strength of gravity at less than 1/32 inch (0.8 mm) is being tested using exquisitely sensitive instruments, such as the precision torsion pendulum at the left.
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A deviation from Newton's Law would be evidence for hidden dimensions.
