One thing about physics today. Many of the new 'discoveries' are really only somone adding a small, approximated term back into a calculation to see what the effect is. Physicists are people, they can make mistakes. So, if god comes down and says we have it wrong, every physicist worth his diploma will immediately ask where the math is wrong.
I have no doubt that they would.
And after that ask where He studied and who are His supporting referees and then point out that as a newcomer to the field of professional science that He is wrong.