Neon Signs?

Article 1:

1) History

The theory behind the Neon sign technology dates to mid 17th century. The concept of electricity was not known at that time. French astronomer Jean Picard observed a faint glow in a Mercury barometer tube, when the tube was shaken. The word neon comes from the Greek “neos,” meaning “the new gas.” Neon gas was discovered by William Ramsey and M. W. Travers in 1898 in London. Neon Signs were later developed by another Frenchman named Georges Claude in 1910. But it took 13 years for this discovery to reach America.

2) How do they work?

One need apply only a high electric voltage betwwen the electrodes at the ends of a glass tube containing the neon(or any other inert) gas and the light begins to glow. The voltage across a discharge tube will accelerate a free electron up to some maximum kinetic energy. What actually happens is electrons moving in the discharge tube collide with atoms of the inert gas thus promoting a few electrons of inert gas to higher energy level. When the electrons come back to their original energy level they emit light. This is the basic working principle of any gas discharge tube. Neon emits light of wavelength of about 600 nm or 6000 A units. The wavelengths ranging from 600 nm to 700 nm corresponds to red color. This is the reason why Neon emits red color.

3) Applications

Neon is often used in Neon Signs(such as Neon Open Signs, Neon Business Signs) and produces bright reddish-orange light.

Neon is used in vacuum tubes, TV tubes, and helium-neon lasers.

* Liquefied neon is commercially used as a cryogenic refrigerant in applications not requiring the lower temperature range attainable with more extreme liquid helium refrigeration.

4) What are neon signs?

Neon signs(you may also call Neon Sign Boards) are very basic devices (that uses neon gas which is a noble gas sometimes also called as ideal gas) consisting of tubes of varying radii. These devices radiate self-emitted light (If you want to know how they radiate light, you should read physics behind it. I shall not discuss it here). Other noble gases can also be used. The gas is maintained at low pressure inside the tube. Neon gas radiates red color, for other colors different noble gases are mixed it in. If you want to know why Neon emits/radiates red color, again you have to red physics.

After reading th above paragraph, you will come to know that Neon signs are basically light-producing tubes in which a word or group of words can be written or a graphic picture is illustrated.

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