Plasma

Hi guys, This is my second article about plasma.

States of Matter: Plasma

                 Plasmas in action

One place you can see plasmas in action is in a fluorescent light bulb or neon sign. In those cases a gas (neon for signs) is subjected to a high voltage, and the electrons are either separated from the atoms of the gas or pushed into higher energy levels. The gas inside the bulb becomes a conductive plasma. The excited electrons that drop back into their previous energy levels emit photons – the light we see in a neon sign or fluorescent lamp.
Plasma TVs work in the same way. A gas — usually argon, neon or xenon — is injected into a sealed gap between two glass panels. An electrical current is passed through the gas, which causes it to glow. The plasma excites red, green and blue phosphors, which combine to give off specific colors, according to eBay.
Another use for plasma is in plasma globes, which are full of noble gas mixes that produce the colors of the "lightning" inside them when an electric current ionizes the gas.
Another example of plasma is in the auroras that surround the poles when the sun is particularly active. The solar wind is a stream of charged particles (mostly protons), which hit Earth's magnetic field. Those particles, being charged, follow magnetic field lines and move toward the poles, where they collide with and excite atoms in the air, mostly oxygen and nitrogen. Like a neon sign, the excited oxygen and nitrogen atoms give off light.

 http://www.livescience.com/54652-plasma.html#sthash.D0Xgpa2k.dpuf

Summary :

The gas inside the bulb becomes a conductive plasma.
 The excited electrons that drop back into their previous energy levels emit photons – the light we see in a neon sign or fluorescent lamp.

Reflection :

Turn off the lamp after use it to decrease the limit. and move toward the poles, where they collide with and excite atoms in the air, mostly oxygen and nitrogen. Like a neon sign, the excited oxygen and nitrogen atoms give off light.