Quote Originally Posted by palani View Post
Now take an electron. It circles an atom is a specific orbit based upon its energy level. If the energy is increased or decreased it either jumps to the next outer shell orbit or an inner orbit (from where it presently is).

The thing is there is no transition. One instant it is in one shell and the next instant it is somewhere else.
I thought this sounded interesting so I googled it. According to Wikipedia there is a transition time (of a few nanoseconds or less), which would mean IMO there is a transition.
https://en.wikipedia.org/wiki/Atomic...ron_transition