Seeing the strings of the string theory

Question

Can we possibly create such a light wave which has a wavelength of Planck length so we can see the strings that the theory supposes there are?

Answer 1

Photons don't exist at the string length scale, or perhaps it's better to say that the photon is a poor description of the behaviour at that scale.

The photon arises from quantum field theory when we quantise the electromagnetic four potential. But quantum field theory emerges as a low energy approximation to string theory. So at string energy scales we have no quantum field theory and therefore we have no photons. At those energies everything is described using interactions of strings.

So we would not ever be able to see a string simply because at the string scale that concept has no meaning.