- TL;DR Summary
- Why are the spectral lines weak in the light from my hydrogen geissler tube, compared to the continuous background? What is the source of this continuous background?
Using a hand spectroscope, I looked at the spectrum of two geissler tubes, helium and hydrogen. The helium spectrum is what I expected, dominated by five distinct lines. The hydrogen spectrum, however, is somewhat disappointing. It is dominated by an almost continuous spectrum, it is not evident where the H-α, H-β, H-γ lines are. Is this normal for a hydrogen geissler tube? Is it because hydrogen is composed of molecules instead of atoms?