How Everything Works
How Everything Works How Everything Works
 

QUESTIONS AND ANSWERS
 
Question 373

Do neon lights have glass that is not colored, but has phosphors that emit a particular color?
A true neon light tube has completely clear (no color, no phosphor) glass surrounding a thin gas of neon atoms. When current runs through that gas, the neon atoms emit red light. In "neon tubes" that emit colors other than red (green, pink, orange, yellow, etc.), there is a layer of phosphor on the inside surface of the glass and mercury vapor inside the tube. These fluorescent tubes probably don't contain any neon at all. You can see the light coming from the phosphor coating. In a true neon tube, you can see the light coming from the gas itself, well inside the glass tube.
         

Copyright 1997-2017 © Louis A. Bloomfield, All Rights Reserved
Privacy Policy