Jon, a 16 year old male from the Internet asks on March 12, 2000,Why doesn't a neon sign finally "run out" of exited atoms and produce dimmer and dimmer light?
viewed 18467 times
The neon light does not get dimmer since the neon is not lost. There is not a leak in the tube so the amount of neon stays constant. The neon atoms just get excited and de-excite in a repeating fashion.
Note: All submissions are moderated prior to posting.
If you found this answer useful, please consider making a small donation to science.ca.