chemistry question #148

Jon, a 16 year old male from the Internet asks on March 12, 2000,

Q:

Why doesn't a neon sign finally "run out" of exited atoms and produce dimmer and dimmer light?
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the answer

John D'Auria answered on March 12, 2000, A:

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.

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