Immediate source of the colored light produced by neon signs?

In summary, the immediate source of the colored light produced by "neon" signs is the interaction of electrons in a gas-filled tube when a stream of electrons passes through it. The specific gas used and the voltage across the tube determine the frequency and color of the light emitted. This process is similar to fluorescence in a vacuum tube with two electrodes in the presence of neon gas.
  • #1
dg_5021
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immediate source of the colored light produced by "neon" signs?

What is the immediate source of the colored light produced by "neon" signs?
 
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  • #2
What exactly do you mean by "immediate" source? Neon signs work by running a stream of electrons through a tube filled with a gas. The electrons in the gas particles are excited (bumped up to higher energy levels) by the electrons in the stream, and as they fall they emit the energy in the form of light. The colour depends on the frequency, which depend son the amount of energy possessed by each photon of light, all of which depends on the specific energy levels of the gas particles (so the type of gas) and the voltage across the tube.
 
  • #3
I think fluorescence occurs in a vacuum tube with two electrodes in the presence of neon gas (this is a brief description of neon lamp). Sirus' explanations are sufficient in theory, if you don't look for more.
 

What is the immediate source of the colored light produced by neon signs?

The immediate source of the colored light produced by neon signs is the excitation of neon gas molecules by high-voltage electricity, causing them to emit photons of light.

How do neon signs produce different colors?

Neon signs produce different colors by using different noble gases, such as argon, helium, and xenon, in combination with neon. Each gas emits a unique color when excited by electricity.

Why are neon signs more vibrant and long-lasting than traditional incandescent or fluorescent lights?

Neon signs are more vibrant and long-lasting because they use a high-voltage discharge of electricity to excite the gas molecules, resulting in a more intense and consistent emission of light. Additionally, neon gas is a very stable element, making the signs more durable and long-lasting.

Do neon signs pose any environmental or health hazards?

Neon signs do not pose any significant environmental or health hazards. The gases used in neon signs are non-toxic, and the signs themselves do not emit any UV radiation.

Can neon signs be used for more than just advertising purposes?

Yes, neon signs can be used for various purposes such as decorative lighting, art installations, and even scientific research. They are also commonly used in the medical field for neonatal care and in industrial settings for gas leak detection.

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