Start Virtual ChemLab, select Atomic Theory, and then select Atomic Emission Spectra from the list of assignments. [tex]\mathrm{A}[/tex] sample of [tex]\mathrm{H}_2[/tex] grs in an electric field will be on the bench and a Spectrometer, a device that collects the light emirted from the gas and sepanates it by wavelength, will be on the right of the lab table. The hydrogen emission spectra will be in the detector window in the upper right corner along with a graph of Intensity vs. wavelength [tex](\lambda)[/tex].