I have two Spectroscopy questions from a "lab" I need to answer. From what I know, Mercury doesnt just emmit blue, yellow, and green light, but also a very significant proportion of ultraviolet light. Since you cant see ultraviloet light, they pressurize the bulbs of Hg gas so it shifts the favorable frequency of light emmited to blue. Does that explain for the yellow and green wavelengths too? And/or the blue light is emmited more intensly, and thus is easier to see since it carries more energy? This could be because ions have either gained or lost electrons (thats how they became ions), and electrons are what causes the emmition of light [ie. electrons absorb energy, then re-emmit it], if there are less/more electrons to absorb energy, the frequencies of the photons emmited might change from a normal atom.