Copper emits a green-blue light in the flame test https://www.youtube.com/watch?v=dwsexjcROH4
replyI'm imagining it's something related to the copper wire.
replyI always wanted to replicate this with a helium balloon and a long, wet string coated with copper filings.
replyYou'd probably need a very large balloon to overcome the weight of the string
replyMaybe just salt water and skip the filings?
reply