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).
And they've known what comes out of the boxâphotons, or light, in the form of the yellow, green, orange, and even blue flickers you see dancing across your backyard on summer nights. But until recently, the actual chemical reactions that produce the firefly's light have been shrouded in mystery.