NexGen Spectrum Tube, Carbon Dioxide

Show how molecules emit light differently than atoms

The NexGen Spectrum Tube, Carbon Dioxide contains CO2 gas and runs on the NexGen Spectrum Tube Power Supply. It produces a pale blue-white glow when energized. Through a spectroscope, the light resolves into a complex band spectrum rather than the sharp, discrete lines produced by noble gas tubes. That difference is the whole point.

Noble gas tubes produce clean line spectra because single atoms have discrete, widely spaced energy levels. CO2 is a three-atom molecule with vibrational and rotational modes layered on top of electronic transitions, which produces overlapping emission bands spread across the spectrum. Side-by-side comparison of the CO2 tube with an argon or neon tube makes that distinction immediate and concrete. Students can also connect CO2 emission spectroscopy to real-world applications in atmospheric remote sensing and greenhouse gas monitoring.

Why Teachers Love It

• Makes the Atom-vs-Molecule Spectral Difference Visible – The band spectrum of CO2 looks nothing like the line spectrum of argon or helium. Running both in the same lab session drives home the relationship between molecular structure and optical emission in a way a diagram alone can't.

• Built for Long-Term Classroom Use – No internal electrodes means the tube resists the wear that shortens conventional spectrum tube life. A hard polymer shell protects the glass from everyday bumps and drops.

• Continuous Use with the NexGen Power Supply – No timing restrictions. Students take their time reading band positions and comparing them to atomic line spectra without a countdown.