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previous: Chris Harden You're completey right, I have stud... -- 8/1/2000 5:55 PM

Re: 6v6 Tube blue gas show

8/1/2000 11:10 PM
Brian	Re: 6v6 Tube blue gas show Molecules absorb energy which bounces their electrons up to higher energy states. Moleclues can only emit at certain frequencies, and this is different for each molecule. I have studied the energy level diagram too many times! The energy of one electron doesn't dictate the frequency of light that will come from a molecule. The electron bounces off the molecule, which means that it still has a lot of energy on its own, although it is moving slower. This makes the operation of the tube less efficient, which is why they do it in a vacuum in the first place. Otherwise the tube would just be a light bulb. (btw- this is what they use in a lot of UV/Visible spectrophotometers, a deuterium bulb which emits light strongly down to about 200nm -- it is just a plate and a cathode in a tube with deuterium (heavy hydrogen) gas. I can't remember the equations either, but I do remember that h is 6.62610^-34 Js and e is -1.6*10^-19 C. BT

8/1/2000 11:10 PM

Brian

Re: 6v6 Tube blue gas show

Molecules absorb energy which bounces their electrons up to higher energy states. Moleclues can only emit at certain frequencies, and this is different for each molecule. I have studied the energy level diagram too many times!

The energy of one electron doesn't dictate the frequency of light that will come from a molecule. The electron bounces off the molecule, which means that it still has a lot of energy on its own, although it is moving slower. This makes the operation of the tube less efficient, which is why they do it in a vacuum in the first place. Otherwise the tube would just be a light bulb.

(btw- this is what they use in a lot of UV/Visible spectrophotometers, a deuterium bulb which emits light strongly down to about 200nm -- it is just a plate and a cathode in a tube with deuterium (heavy hydrogen) gas.

I can't remember the equations either, but I do remember that h is 6.626*10^-34 J*s and e is -1.6*10^-19 C.

Replies:

MBSetzer Seems to me if the gas is glowing i... -- 8/1/2000 11:53 PM