In calculating UV/VIS spectra with computational procedures (say, TD-DFT), it is commonly assumed that the geometry of the ground-state is still valid also for the excited state due to the short time scale (I more or less took this statement from here).
So I asked myself, are there good references on time scales for chemical processes? Some phenomena may be obviously faster than others, but others (say, two molecular excitations) may be not that obvious to compare.
I am looking for something simple, like a table (or tables) with examples.