Rachel is a 35 year old school teacher who has no man in her life and lives with her mother.
Each element give off a particular color when heated in a flame. (Some are colorless). Copper gives off a green flame but to do that there must be some copper compound IN the flame. (there are many other elements that also could be causing a green flame).
When the electron falls from the excited state, it loses energy in the form of light, a process called emission. The excitation of electrons followed by the emission of green light explains the green flame from the previous example of heated copper.