By quantum theory , state 1 has a fixed energy of E .
State 2 has a fixed energy of E. Now , what would happen if an electron in state 1 were to move to state 2 ?
By quantum theory , state 1 has a fixed energy of E , and state 2 has a fixed energy of E. Now , what would happen if an electron in state 1 were to move to state 2 ?