Recent content by bl128

Hi pullbangdead, You are right to be doubtful. I don't think what you're referring to is really fluorescence because by definition, fluorescence requires a photon to be absorbed by the fluorescing molecule. No absorption takes place when a laser ionizes a gas. It's more like the photoelectric...

For gasses the energy needed is too high for short wavelength light sources (i.e. blue-violet/UV) to induce fluorescence.  You need much much more energy to promote the gas atoms to a higher energy level to produce photons.  You can do it with a high voltage, just like what one would use with...