Helium lamp

"In the helium lamp an electron from the discharge impacts on a He atom, ionises it and at the same time excites it to a superposition of several states. For simplicity, let us consider only the states that are of practical importance and assume that the He+ ion immediately after the impact is left in the following superposition of states............."

What is a helium lamp?

tiny-tim
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welcome to pf!

hi kodimmudi! welcome to pf!

it's like a sodium lamp, except that it uses helium, see … http://en.wikipedia.org/wiki/Gas-discharge_lamp" [Broken]

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