I'm interested in the (very) low energy limit of quantum electrodynamics. I've seen that taking this limit does not yield Maxwell equations, but a quantum corrected non-linear version of them.

- If quantum phenomena are responsible for what we see in the macroscipic world, it is expected that there is a limit which does lead to Maxwell equations from QED? how should I think of this limit?
- A classical theory of strong and weak interactions is not physically meaningful. Is this a direct consequence that these fields are (unlike electrodynamics) mediated by short-range interactions? Kindly prove or disprove.

This post imported from StackExchange Physics at 2014-08-11 14:52 (UCT), posted by SE-user c.p.