Talk:Neon sign/Archives/2018

External links modified (February 2018)
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neon tube questions
A neon tube lights up when a large external voltage is applied across it right? So which one best describe the type of spectrum observed when the gas in the tube is observed through a diffraction grating?

A. Absorption spectrum B. Continuous emission spectrum C. Line absorption s.... D. Line emission s.....

Help?! K.lokuhle.lee (talk) 16:32, 3 May 2018 (UTC)


 * Ask the above question at Reference desk/Science. --Guy Macon (talk) 06:02, 18 September 2018 (UTC)

"black spot emitting lead fumes"
What is a black spot emitting lead fume? --Guy Macon (talk) 06:01, 18 September 2018 (UTC)